20281660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{317}}^1\times {\mathrm{457}}^1$

素因数の和:790

約数の個数: 48

約数和(自身を含む): 48936384

約数和(自身を除く): 28654724

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 317, 457, 634, 914, 1268, 1585, 1828, 2219, 2285, 3170, 3199, 4438, 4570, 6340, 6398, 8876, 9140, 11095, 12796, 15995, 22190, 31990, 44380, 63980, 144869, 289738, 579476, 724345, 1014083, 1448690, 2028166, 2897380, 4056332, 5070415, 10140830, 20281660]

約数ペア:

[(1, 20281660), (2, 10140830), (4, 5070415), (5, 4056332), (7, 2897380), (10, 2028166), (14, 1448690), (20, 1014083), (28, 724345), (35, 579476), (70, 289738), (140, 144869), (317, 63980), (457, 44380), (634, 31990), (914, 22190), (1268, 15995), (1585, 12796), (1828, 11095), (2219, 9140), (2285, 8876), (3170, 6398), (3199, 6340), (4438, 4570)]