21195720

素因数分解:

$2^3\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{647}}^1$

素因数の和:684

約数の個数: 192

約数和(自身を含む): 84913920

約数和(自身を除く): 63718200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 18, 20, 21, 24, 26, 28, 30, 35, 36, 39, 40, 42, 45, 52, 56, 60, 63, 65, 70, 72, 78, 84, 90, 91, 104, 105, 117, 120, 126, 130, 140, 156, 168, 180, 182, 195, 210, 234, 252, 260, 273, 280, 312, 315, 360, 364, 390, 420, 455, 468, 504, 520, 546, 585, 630, 647, 728, 780, 819, 840, 910, 936, 1092, 1170, 1260, 1294, 1365, 1560, 1638, 1820, 1941, 2184, 2340, 2520, 2588, 2730, 3235, 3276, 3640, 3882, 4095, 4529, 4680, 5176, 5460, 5823, 6470, 6552, 7764, 8190, 8411, 9058, 9705, 10920, 11646, 12940, 13587, 15528, 16380, 16822, 18116, 19410, 22645, 23292, 25233, 25880, 27174, 29115, 32760, 33644, 36232, 38820, 40761, 42055, 45290, 46584, 50466, 54348, 58230, 58877, 67288, 67935, 75699, 77640, 81522, 84110, 90580, 100932, 108696, 116460, 117754, 126165, 135870, 151398, 163044, 168220, 176631, 181160, 201864, 203805, 232920, 235508, 252330, 271740, 294385, 302796, 326088, 336440, 353262, 378495, 407610, 471016, 504660, 529893, 543480, 588770, 605592, 706524, 756990, 815220, 883155, 1009320, 1059786, 1177540, 1413048, 1513980, 1630440, 1766310, 2119572, 2355080, 2649465, 3027960, 3532620, 4239144, 5298930, 7065240, 10597860, 21195720]

約数ペア:

[(1, 21195720), (2, 10597860), (3, 7065240), (4, 5298930), (5, 4239144), (6, 3532620), (7, 3027960), (8, 2649465), (9, 2355080), (10, 2119572), (12, 1766310), (13, 1630440), (14, 1513980), (15, 1413048), (18, 1177540), (20, 1059786), (21, 1009320), (24, 883155), (26, 815220), (28, 756990), (30, 706524), (35, 605592), (36, 588770), (39, 543480), (40, 529893), (42, 504660), (45, 471016), (52, 407610), (56, 378495), (60, 353262), (63, 336440), (65, 326088), (70, 302796), (72, 294385), (78, 271740), (84, 252330), (90, 235508), (91, 232920), (104, 203805), (105, 201864), (117, 181160), (120, 176631), (126, 168220), (130, 163044), (140, 151398), (156, 135870), (168, 126165), (180, 117754), (182, 116460), (195, 108696), (210, 100932), (234, 90580), (252, 84110), (260, 81522), (273, 77640), (280, 75699), (312, 67935), (315, 67288), (360, 58877), (364, 58230), (390, 54348), (420, 50466), (455, 46584), (468, 45290), (504, 42055), (520, 40761), (546, 38820), (585, 36232), (630, 33644), (647, 32760), (728, 29115), (780, 27174), (819, 25880), (840, 25233), (910, 23292), (936, 22645), (1092, 19410), (1170, 18116), (1260, 16822), (1294, 16380), (1365, 15528), (1560, 13587), (1638, 12940), (1820, 11646), (1941, 10920), (2184, 9705), (2340, 9058), (2520, 8411), (2588, 8190), (2730, 7764), (3235, 6552), (3276, 6470), (3640, 5823), (3882, 5460), (4095, 5176), (4529, 4680)]