81820960

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{283}}^1$

素因数の和:450

約数の個数: 96

約数和(自身を含む): 210409920

約数和(自身を除く): 128588960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 139, 160, 208, 260, 278, 283, 416, 520, 556, 566, 695, 1040, 1112, 1132, 1390, 1415, 1807, 2080, 2224, 2264, 2780, 2830, 3614, 3679, 4448, 4528, 5560, 5660, 7228, 7358, 9035, 9056, 11120, 11320, 14456, 14716, 18070, 18395, 22240, 22640, 28912, 29432, 36140, 36790, 39337, 45280, 57824, 58864, 72280, 73580, 78674, 117728, 144560, 147160, 157348, 196685, 289120, 294320, 314696, 393370, 511381, 588640, 629392, 786740, 1022762, 1258784, 1573480, 2045524, 2556905, 3146960, 4091048, 5113810, 6293920, 8182096, 10227620, 16364192, 20455240, 40910480, 81820960]

約数ペア:

[(1, 81820960), (2, 40910480), (4, 20455240), (5, 16364192), (8, 10227620), (10, 8182096), (13, 6293920), (16, 5113810), (20, 4091048), (26, 3146960), (32, 2556905), (40, 2045524), (52, 1573480), (65, 1258784), (80, 1022762), (104, 786740), (130, 629392), (139, 588640), (160, 511381), (208, 393370), (260, 314696), (278, 294320), (283, 289120), (416, 196685), (520, 157348), (556, 147160), (566, 144560), (695, 117728), (1040, 78674), (1112, 73580), (1132, 72280), (1390, 58864), (1415, 57824), (1807, 45280), (2080, 39337), (2224, 36790), (2264, 36140), (2780, 29432), (2830, 28912), (3614, 22640), (3679, 22240), (4448, 18395), (4528, 18070), (5560, 14716), (5660, 14456), (7228, 11320), (7358, 11120), (9035, 9056)]