19917240

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{181}}^1$

素因数の和:333

約数の個数: 128

約数和(自身を含む): 69189120

約数和(自身を除く): 49271880

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 131, 140, 168, 181, 210, 262, 280, 362, 393, 420, 524, 543, 655, 724, 786, 840, 905, 917, 1048, 1086, 1267, 1310, 1448, 1572, 1810, 1834, 1965, 2172, 2534, 2620, 2715, 2751, 3144, 3620, 3668, 3801, 3930, 4344, 4585, 5068, 5240, 5430, 5502, 6335, 7240, 7336, 7602, 7860, 9170, 10136, 10860, 11004, 12670, 13755, 15204, 15720, 18340, 19005, 21720, 22008, 23711, 25340, 27510, 30408, 36680, 38010, 47422, 50680, 55020, 71133, 76020, 94844, 110040, 118555, 142266, 152040, 165977, 189688, 237110, 284532, 331954, 355665, 474220, 497931, 569064, 663908, 711330, 829885, 948440, 995862, 1327816, 1422660, 1659770, 1991724, 2489655, 2845320, 3319540, 3983448, 4979310, 6639080, 9958620, 19917240]

約数ペア:

[(1, 19917240), (2, 9958620), (3, 6639080), (4, 4979310), (5, 3983448), (6, 3319540), (7, 2845320), (8, 2489655), (10, 1991724), (12, 1659770), (14, 1422660), (15, 1327816), (20, 995862), (21, 948440), (24, 829885), (28, 711330), (30, 663908), (35, 569064), (40, 497931), (42, 474220), (56, 355665), (60, 331954), (70, 284532), (84, 237110), (105, 189688), (120, 165977), (131, 152040), (140, 142266), (168, 118555), (181, 110040), (210, 94844), (262, 76020), (280, 71133), (362, 55020), (393, 50680), (420, 47422), (524, 38010), (543, 36680), (655, 30408), (724, 27510), (786, 25340), (840, 23711), (905, 22008), (917, 21720), (1048, 19005), (1086, 18340), (1267, 15720), (1310, 15204), (1448, 13755), (1572, 12670), (1810, 11004), (1834, 10860), (1965, 10136), (2172, 9170), (2534, 7860), (2620, 7602), (2715, 7336), (2751, 7240), (3144, 6335), (3620, 5502), (3668, 5430), (3801, 5240), (3930, 5068), (4344, 4585)]