21409724

素因数分解:

$2^2\times 7^1\times {\mathrm{163}}^1\times {\mathrm{4691}}^1$

素因数の和:4865

約数の個数: 24

約数和(自身を含む): 43091328

約数和(自身を除く): 21681604

約数列:

[1, 2, 4, 7, 14, 28, 163, 326, 652, 1141, 2282, 4564, 4691, 9382, 18764, 32837, 65674, 131348, 764633, 1529266, 3058532, 5352431, 10704862, 21409724]

約数ペア:

[(1, 21409724), (2, 10704862), (4, 5352431), (7, 3058532), (14, 1529266), (28, 764633), (163, 131348), (326, 65674), (652, 32837), (1141, 18764), (2282, 9382), (4564, 4691)]