128260520

素因数分解:

$2^3\times 5^1\times {\mathrm{523}}^1\times {\mathrm{6131}}^1$

素因数の和:6665

約数の個数: 32

約数和(自身を含む): 289185120

約数和(自身を除く): 160924600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 523, 1046, 2092, 2615, 4184, 5230, 6131, 10460, 12262, 20920, 24524, 30655, 49048, 61310, 122620, 245240, 3206513, 6413026, 12826052, 16032565, 25652104, 32065130, 64130260, 128260520]

約数ペア:

[(1, 128260520), (2, 64130260), (4, 32065130), (5, 25652104), (8, 16032565), (10, 12826052), (20, 6413026), (40, 3206513), (523, 245240), (1046, 122620), (2092, 61310), (2615, 49048), (4184, 30655), (5230, 24524), (6131, 20920), (10460, 12262)]