21944840

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13381}}^1$

素因数の和:13433

約数の個数: 32

約数和(自身を含む): 50583960

約数和(自身を除く): 28639120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13381, 26762, 53524, 66905, 107048, 133810, 267620, 535240, 548621, 1097242, 2194484, 2743105, 4388968, 5486210, 10972420, 21944840]

約数ペア:

[(1, 21944840), (2, 10972420), (4, 5486210), (5, 4388968), (8, 2743105), (10, 2194484), (20, 1097242), (40, 548621), (41, 535240), (82, 267620), (164, 133810), (205, 107048), (328, 66905), (410, 53524), (820, 26762), (1640, 13381)]