21790972

素因数分解:

$2^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{4957}}^1$

素因数の和:5125

約数の個数: 24

約数和(自身を含む): 43868384

約数和(自身を除く): 22077412

約数列:

[1, 2, 4, 7, 14, 28, 157, 314, 628, 1099, 2198, 4396, 4957, 9914, 19828, 34699, 69398, 138796, 778249, 1556498, 3112996, 5447743, 10895486, 21790972]

約数ペア:

[(1, 21790972), (2, 10895486), (4, 5447743), (7, 3112996), (14, 1556498), (28, 778249), (157, 138796), (314, 69398), (628, 34699), (1099, 19828), (2198, 9914), (4396, 4957)]