15666817820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{311}}^1\times {\mathrm{2621}}^1$

素因数の和:3003

約数の個数: 72

約数和(自身を含む): 34118177184

約数和(自身を除く): 18451359364

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 311, 620, 622, 961, 1244, 1555, 1922, 2621, 3110, 3844, 4805, 5242, 6220, 9610, 9641, 10484, 13105, 19220, 19282, 26210, 38564, 48205, 52420, 81251, 96410, 162502, 192820, 298871, 325004, 406255, 597742, 812510, 815131, 1195484, 1494355, 1625020, 1630262, 2518781, 2988710, 3260524, 4075655, 5037562, 5977420, 8151310, 10075124, 12593905, 16302620, 25187810, 25269061, 50375620, 50538122, 101076244, 126345305, 252690610, 505381220, 783340891, 1566681782, 3133363564, 3916704455, 7833408910, 15666817820]

約数ペア:

[(1, 15666817820), (2, 7833408910), (4, 3916704455), (5, 3133363564), (10, 1566681782), (20, 783340891), (31, 505381220), (62, 252690610), (124, 126345305), (155, 101076244), (310, 50538122), (311, 50375620), (620, 25269061), (622, 25187810), (961, 16302620), (1244, 12593905), (1555, 10075124), (1922, 8151310), (2621, 5977420), (3110, 5037562), (3844, 4075655), (4805, 3260524), (5242, 2988710), (6220, 2518781), (9610, 1630262), (9641, 1625020), (10484, 1494355), (13105, 1195484), (19220, 815131), (19282, 812510), (26210, 597742), (38564, 406255), (48205, 325004), (52420, 298871), (81251, 192820), (96410, 162502)]