21401828

素因数分解:

$2^2\times 7^3\times {\mathrm{19}}^1\times {\mathrm{821}}^1$

素因数の和:865

約数の個数: 48

約数和(自身を含む): 46032000

約数和(自身を除く): 24630172

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 49, 76, 98, 133, 196, 266, 343, 532, 686, 821, 931, 1372, 1642, 1862, 3284, 3724, 5747, 6517, 11494, 13034, 15599, 22988, 26068, 31198, 40229, 62396, 80458, 109193, 160916, 218386, 281603, 436772, 563206, 764351, 1126412, 1528702, 3057404, 5350457, 10700914, 21401828]

約数ペア:

[(1, 21401828), (2, 10700914), (4, 5350457), (7, 3057404), (14, 1528702), (19, 1126412), (28, 764351), (38, 563206), (49, 436772), (76, 281603), (98, 218386), (133, 160916), (196, 109193), (266, 80458), (343, 62396), (532, 40229), (686, 31198), (821, 26068), (931, 22988), (1372, 15599), (1642, 13034), (1862, 11494), (3284, 6517), (3724, 5747)]