20990710

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2647}}^1$

素因数の和:2728

約数の個数: 32

約数和(自身を含む): 41372352

約数和(自身を除く): 20381642

約数列:

[1, 2, 5, 10, 13, 26, 61, 65, 122, 130, 305, 610, 793, 1586, 2647, 3965, 5294, 7930, 13235, 26470, 34411, 68822, 161467, 172055, 322934, 344110, 807335, 1614670, 2099071, 4198142, 10495355, 20990710]

約数ペア:

[(1, 20990710), (2, 10495355), (5, 4198142), (10, 2099071), (13, 1614670), (26, 807335), (61, 344110), (65, 322934), (122, 172055), (130, 161467), (305, 68822), (610, 34411), (793, 26470), (1586, 13235), (2647, 7930), (3965, 5294)]