20405700

素因数分解:

$2^2\times 3^2\times 5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:147

約数の個数: 216

約数和(自身を含む): 75828480

約数和(自身を除く): 55422780

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 25, 28, 30, 35, 36, 41, 42, 45, 50, 60, 63, 70, 75, 79, 82, 84, 90, 100, 105, 123, 126, 140, 150, 158, 164, 175, 180, 205, 210, 225, 237, 246, 252, 287, 300, 315, 316, 350, 369, 395, 410, 420, 450, 474, 492, 525, 553, 574, 615, 630, 700, 711, 738, 790, 820, 861, 900, 948, 1025, 1050, 1106, 1148, 1185, 1230, 1260, 1422, 1435, 1476, 1575, 1580, 1659, 1722, 1845, 1975, 2050, 2100, 2212, 2370, 2460, 2583, 2765, 2844, 2870, 3075, 3150, 3239, 3318, 3444, 3555, 3690, 3950, 4100, 4305, 4740, 4977, 5166, 5530, 5740, 5925, 6150, 6300, 6478, 6636, 7110, 7175, 7380, 7900, 8295, 8610, 9225, 9717, 9954, 10332, 11060, 11850, 12300, 12915, 12956, 13825, 14220, 14350, 16195, 16590, 17220, 17775, 18450, 19434, 19908, 21525, 22673, 23700, 24885, 25830, 27650, 28700, 29151, 32390, 33180, 35550, 36900, 38868, 41475, 43050, 45346, 48585, 49770, 51660, 55300, 58302, 64575, 64780, 68019, 71100, 80975, 82950, 86100, 90692, 97170, 99540, 113365, 116604, 124425, 129150, 136038, 145755, 161950, 165900, 194340, 204057, 226730, 242925, 248850, 258300, 272076, 291510, 323900, 340095, 408114, 453460, 485850, 497700, 566825, 583020, 680190, 728775, 816228, 971700, 1020285, 1133650, 1360380, 1457550, 1700475, 2040570, 2267300, 2915100, 3400950, 4081140, 5101425, 6801900, 10202850, 20405700]

約数ペア:

[(1, 20405700), (2, 10202850), (3, 6801900), (4, 5101425), (5, 4081140), (6, 3400950), (7, 2915100), (9, 2267300), (10, 2040570), (12, 1700475), (14, 1457550), (15, 1360380), (18, 1133650), (20, 1020285), (21, 971700), (25, 816228), (28, 728775), (30, 680190), (35, 583020), (36, 566825), (41, 497700), (42, 485850), (45, 453460), (50, 408114), (60, 340095), (63, 323900), (70, 291510), (75, 272076), (79, 258300), (82, 248850), (84, 242925), (90, 226730), (100, 204057), (105, 194340), (123, 165900), (126, 161950), (140, 145755), (150, 136038), (158, 129150), (164, 124425), (175, 116604), (180, 113365), (205, 99540), (210, 97170), (225, 90692), (237, 86100), (246, 82950), (252, 80975), (287, 71100), (300, 68019), (315, 64780), (316, 64575), (350, 58302), (369, 55300), (395, 51660), (410, 49770), (420, 48585), (450, 45346), (474, 43050), (492, 41475), (525, 38868), (553, 36900), (574, 35550), (615, 33180), (630, 32390), (700, 29151), (711, 28700), (738, 27650), (790, 25830), (820, 24885), (861, 23700), (900, 22673), (948, 21525), (1025, 19908), (1050, 19434), (1106, 18450), (1148, 17775), (1185, 17220), (1230, 16590), (1260, 16195), (1422, 14350), (1435, 14220), (1476, 13825), (1575, 12956), (1580, 12915), (1659, 12300), (1722, 11850), (1845, 11060), (1975, 10332), (2050, 9954), (2100, 9717), (2212, 9225), (2370, 8610), (2460, 8295), (2583, 7900), (2765, 7380), (2844, 7175), (2870, 7110), (3075, 6636), (3150, 6478), (3239, 6300), (3318, 6150), (3444, 5925), (3555, 5740), (3690, 5530), (3950, 5166), (4100, 4977), (4305, 4740)]