21727120

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2689}}^1$

素因数の和:2803

約数の個数: 40

約数和(自身を含む): 51034680

約数和(自身を除く): 29307560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2689, 4040, 5378, 8080, 10756, 13445, 21512, 26890, 43024, 53780, 107560, 215120, 271589, 543178, 1086356, 1357945, 2172712, 2715890, 4345424, 5431780, 10863560, 21727120]

約数ペア:

[(1, 21727120), (2, 10863560), (4, 5431780), (5, 4345424), (8, 2715890), (10, 2172712), (16, 1357945), (20, 1086356), (40, 543178), (80, 271589), (101, 215120), (202, 107560), (404, 53780), (505, 43024), (808, 26890), (1010, 21512), (1616, 13445), (2020, 10756), (2689, 8080), (4040, 5378)]