21000992140

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{239}}^1\times {\mathrm{93479}}^1$

素因数の和:93774

約数の個数: 48

約数和(自身を含む): 45229363200

約数和(自身を除く): 24228371060

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 239, 470, 478, 940, 956, 1195, 2390, 4780, 11233, 22466, 44932, 56165, 93479, 112330, 186958, 224660, 373916, 467395, 934790, 1869580, 4393513, 8787026, 17574052, 21967565, 22341481, 43935130, 44682962, 87870260, 89365924, 111707405, 223414810, 446829620, 1050049607, 2100099214, 4200198428, 5250248035, 10500496070, 21000992140]

約数ペア:

[(1, 21000992140), (2, 10500496070), (4, 5250248035), (5, 4200198428), (10, 2100099214), (20, 1050049607), (47, 446829620), (94, 223414810), (188, 111707405), (235, 89365924), (239, 87870260), (470, 44682962), (478, 43935130), (940, 22341481), (956, 21967565), (1195, 17574052), (2390, 8787026), (4780, 4393513), (11233, 1869580), (22466, 934790), (44932, 467395), (56165, 373916), (93479, 224660), (112330, 186958)]