21348778840

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31395263}}^1$

素因数の和:31395291

約数の個数: 32

約数和(自身を含む): 50860327680

約数和(自身を除く): 29511548840

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31395263, 62790526, 125581052, 156976315, 251162104, 313952630, 533719471, 627905260, 1067438942, 1255810520, 2134877884, 2668597355, 4269755768, 5337194710, 10674389420, 21348778840]

約数ペア:

[(1, 21348778840), (2, 10674389420), (4, 5337194710), (5, 4269755768), (8, 2668597355), (10, 2134877884), (17, 1255810520), (20, 1067438942), (34, 627905260), (40, 533719471), (68, 313952630), (85, 251162104), (136, 156976315), (170, 125581052), (340, 62790526), (680, 31395263)]