21174140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81439}}^1$

素因数の和:81461

約数の個数: 24

約数和(自身を含む): 47886720

約数和(自身を除く): 26712580

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81439, 162878, 325756, 407195, 814390, 1058707, 1628780, 2117414, 4234828, 5293535, 10587070, 21174140]

約数ペア:

[(1, 21174140), (2, 10587070), (4, 5293535), (5, 4234828), (10, 2117414), (13, 1628780), (20, 1058707), (26, 814390), (52, 407195), (65, 325756), (130, 162878), (260, 81439)]