21005198590

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{4091}}^1\times {\mathrm{13877}}^1$

素因数の和:18012

約数の個数: 32

約数和(自身を含む): 38843522784

約数和(自身を除く): 17838324194

約数列:

[1, 2, 5, 10, 37, 74, 185, 370, 4091, 8182, 13877, 20455, 27754, 40910, 69385, 138770, 151367, 302734, 513449, 756835, 1026898, 1513670, 2567245, 5134490, 56770807, 113541614, 283854035, 567708070, 2100519859, 4201039718, 10502599295, 21005198590]

約数ペア:

[(1, 21005198590), (2, 10502599295), (5, 4201039718), (10, 2100519859), (37, 567708070), (74, 283854035), (185, 113541614), (370, 56770807), (4091, 5134490), (8182, 2567245), (13877, 1513670), (20455, 1026898), (27754, 756835), (40910, 513449), (69385, 302734), (138770, 151367)]