20007728

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2237}}^1$

素因数の和:2301

約数の個数: 40

約数和(自身を含む): 42736848

約数和(自身を除く): 22729120

約数列:

[1, 2, 4, 8, 13, 16, 26, 43, 52, 86, 104, 172, 208, 344, 559, 688, 1118, 2236, 2237, 4472, 4474, 8944, 8948, 17896, 29081, 35792, 58162, 96191, 116324, 192382, 232648, 384764, 465296, 769528, 1250483, 1539056, 2500966, 5001932, 10003864, 20007728]

約数ペア:

[(1, 20007728), (2, 10003864), (4, 5001932), (8, 2500966), (13, 1539056), (16, 1250483), (26, 769528), (43, 465296), (52, 384764), (86, 232648), (104, 192382), (172, 116324), (208, 96191), (344, 58162), (559, 35792), (688, 29081), (1118, 17896), (2236, 8948), (2237, 8944), (4472, 4474)]