20021720

素因数分解:

$2^3\times 5^1\times {\mathrm{317}}^1\times {\mathrm{1579}}^1$

素因数の和:1907

約数の個数: 32

約数和(自身を含む): 45219600

約数和(自身を除く): 25197880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 317, 634, 1268, 1579, 1585, 2536, 3158, 3170, 6316, 6340, 7895, 12632, 12680, 15790, 31580, 63160, 500543, 1001086, 2002172, 2502715, 4004344, 5005430, 10010860, 20021720]

約数ペア:

[(1, 20021720), (2, 10010860), (4, 5005430), (5, 4004344), (8, 2502715), (10, 2002172), (20, 1001086), (40, 500543), (317, 63160), (634, 31580), (1268, 15790), (1579, 12680), (1585, 12632), (2536, 7895), (3158, 6340), (3170, 6316)]