21157948

素因数分解:

$2^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{4813}}^1$

素因数の和:4981

約数の個数: 24

約数和(自身を含む): 42594272

約数和(自身を除く): 21436324

約数列:

[1, 2, 4, 7, 14, 28, 157, 314, 628, 1099, 2198, 4396, 4813, 9626, 19252, 33691, 67382, 134764, 755641, 1511282, 3022564, 5289487, 10578974, 21157948]

約数ペア:

[(1, 21157948), (2, 10578974), (4, 5289487), (7, 3022564), (14, 1511282), (28, 755641), (157, 134764), (314, 67382), (628, 33691), (1099, 19252), (2198, 9626), (4396, 4813)]