28101680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20663}}^1$

素因数の和:20693

約数の個数: 40

約数和(自身を含む): 69183072

約数和(自身を除く): 41081392

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 20663, 41326, 82652, 103315, 165304, 206630, 330608, 351271, 413260, 702542, 826520, 1405084, 1653040, 1756355, 2810168, 3512710, 5620336, 7025420, 14050840, 28101680]

約数ペア:

[(1, 28101680), (2, 14050840), (4, 7025420), (5, 5620336), (8, 3512710), (10, 2810168), (16, 1756355), (17, 1653040), (20, 1405084), (34, 826520), (40, 702542), (68, 413260), (80, 351271), (85, 330608), (136, 206630), (170, 165304), (272, 103315), (340, 82652), (680, 41326), (1360, 20663)]