21503220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{443}}^1\times {\mathrm{809}}^1$

素因数の和:1264

約数の個数: 48

約数和(自身を含む): 60419520

約数和(自身を除く): 38916300

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 443, 809, 886, 1329, 1618, 1772, 2215, 2427, 2658, 3236, 4045, 4430, 4854, 5316, 6645, 8090, 8860, 9708, 12135, 13290, 16180, 24270, 26580, 48540, 358387, 716774, 1075161, 1433548, 1791935, 2150322, 3583870, 4300644, 5375805, 7167740, 10751610, 21503220]

約数ペア:

[(1, 21503220), (2, 10751610), (3, 7167740), (4, 5375805), (5, 4300644), (6, 3583870), (10, 2150322), (12, 1791935), (15, 1433548), (20, 1075161), (30, 716774), (60, 358387), (443, 48540), (809, 26580), (886, 24270), (1329, 16180), (1618, 13290), (1772, 12135), (2215, 9708), (2427, 8860), (2658, 8090), (3236, 6645), (4045, 5316), (4430, 4854)]