20210780

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{109}}^1\times {\mathrm{127}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 43760640

約数和(自身を除く): 23549860

約数列:

[1, 2, 4, 5, 10, 20, 73, 109, 127, 146, 218, 254, 292, 365, 436, 508, 545, 635, 730, 1090, 1270, 1460, 2180, 2540, 7957, 9271, 13843, 15914, 18542, 27686, 31828, 37084, 39785, 46355, 55372, 69215, 79570, 92710, 138430, 159140, 185420, 276860, 1010539, 2021078, 4042156, 5052695, 10105390, 20210780]

約数ペア:

[(1, 20210780), (2, 10105390), (4, 5052695), (5, 4042156), (10, 2021078), (20, 1010539), (73, 276860), (109, 185420), (127, 159140), (146, 138430), (218, 92710), (254, 79570), (292, 69215), (365, 55372), (436, 46355), (508, 39785), (545, 37084), (635, 31828), (730, 27686), (1090, 18542), (1270, 15914), (1460, 13843), (2180, 9271), (2540, 7957)]