21030620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1721}}^1$

素因数の和:1790

約数の個数: 48

約数和(自身を含む): 48601728

約数和(自身を除く): 27571108

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 47, 52, 65, 94, 130, 188, 235, 260, 470, 611, 940, 1222, 1721, 2444, 3055, 3442, 6110, 6884, 8605, 12220, 17210, 22373, 34420, 44746, 80887, 89492, 111865, 161774, 223730, 323548, 404435, 447460, 808870, 1051531, 1617740, 2103062, 4206124, 5257655, 10515310, 21030620]

約数ペア:

[(1, 21030620), (2, 10515310), (4, 5257655), (5, 4206124), (10, 2103062), (13, 1617740), (20, 1051531), (26, 808870), (47, 447460), (52, 404435), (65, 323548), (94, 223730), (130, 161774), (188, 111865), (235, 89492), (260, 80887), (470, 44746), (611, 34420), (940, 22373), (1222, 17210), (1721, 12220), (2444, 8605), (3055, 6884), (3442, 6110)]