21004180

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{379}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 47113920

約数和(自身を除く): 26109740

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 163, 170, 326, 340, 379, 652, 758, 815, 1516, 1630, 1895, 2771, 3260, 3790, 5542, 6443, 7580, 11084, 12886, 13855, 25772, 27710, 32215, 55420, 61777, 64430, 123554, 128860, 247108, 308885, 617770, 1050209, 1235540, 2100418, 4200836, 5251045, 10502090, 21004180]

約数ペア:

[(1, 21004180), (2, 10502090), (4, 5251045), (5, 4200836), (10, 2100418), (17, 1235540), (20, 1050209), (34, 617770), (68, 308885), (85, 247108), (163, 128860), (170, 123554), (326, 64430), (340, 61777), (379, 55420), (652, 32215), (758, 27710), (815, 25772), (1516, 13855), (1630, 12886), (1895, 11084), (2771, 7580), (3260, 6443), (3790, 5542)]