20541880

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3271}}^1$

素因数の和:3439

約数の個数: 32

約数和(自身を含む): 46527840

約数和(自身を除く): 25985960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 3271, 6280, 6542, 13084, 16355, 26168, 32710, 65420, 130840, 513547, 1027094, 2054188, 2567735, 4108376, 5135470, 10270940, 20541880]

約数ペア:

[(1, 20541880), (2, 10270940), (4, 5135470), (5, 4108376), (8, 2567735), (10, 2054188), (20, 1027094), (40, 513547), (157, 130840), (314, 65420), (628, 32710), (785, 26168), (1256, 16355), (1570, 13084), (3140, 6542), (3271, 6280)]