21214640

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{821}}^1$

素因数の和:870

約数の個数: 80

約数和(自身を含む): 55041120

約数和(自身を除く): 33826480

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 34, 38, 40, 68, 76, 80, 85, 95, 136, 152, 170, 190, 272, 304, 323, 340, 380, 646, 680, 760, 821, 1292, 1360, 1520, 1615, 1642, 2584, 3230, 3284, 4105, 5168, 6460, 6568, 8210, 12920, 13136, 13957, 15599, 16420, 25840, 27914, 31198, 32840, 55828, 62396, 65680, 69785, 77995, 111656, 124792, 139570, 155990, 223312, 249584, 265183, 279140, 311980, 530366, 558280, 623960, 1060732, 1116560, 1247920, 1325915, 2121464, 2651830, 4242928, 5303660, 10607320, 21214640]

約数ペア:

[(1, 21214640), (2, 10607320), (4, 5303660), (5, 4242928), (8, 2651830), (10, 2121464), (16, 1325915), (17, 1247920), (19, 1116560), (20, 1060732), (34, 623960), (38, 558280), (40, 530366), (68, 311980), (76, 279140), (80, 265183), (85, 249584), (95, 223312), (136, 155990), (152, 139570), (170, 124792), (190, 111656), (272, 77995), (304, 69785), (323, 65680), (340, 62396), (380, 55828), (646, 32840), (680, 31198), (760, 27914), (821, 25840), (1292, 16420), (1360, 15599), (1520, 13957), (1615, 13136), (1642, 12920), (2584, 8210), (3230, 6568), (3284, 6460), (4105, 5168)]