21098116

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{631}}^1\times {\mathrm{643}}^1$

素因数の和:1291

約数の個数: 24

約数和(自身を含む): 39886784

約数和(自身を除く): 18788668

約数列:

[1, 2, 4, 13, 26, 52, 631, 643, 1262, 1286, 2524, 2572, 8203, 8359, 16406, 16718, 32812, 33436, 405733, 811466, 1622932, 5274529, 10549058, 21098116]

約数ペア:

[(1, 21098116), (2, 10549058), (4, 5274529), (13, 1622932), (26, 811466), (52, 405733), (631, 33436), (643, 32812), (1262, 16718), (1286, 16406), (2524, 8359), (2572, 8203)]