20960840

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12781}}^1$

素因数の和:12833

約数の個数: 32

約数和(自身を含む): 48315960

約数和(自身を除く): 27355120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12781, 25562, 51124, 63905, 102248, 127810, 255620, 511240, 524021, 1048042, 2096084, 2620105, 4192168, 5240210, 10480420, 20960840]

約数ペア:

[(1, 20960840), (2, 10480420), (4, 5240210), (5, 4192168), (8, 2620105), (10, 2096084), (20, 1048042), (40, 524021), (41, 511240), (82, 255620), (164, 127810), (205, 102248), (328, 63905), (410, 51124), (820, 25562), (1640, 12781)]