20456080

素因数分解:

$2^4\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1061}}^1$

素因数の和:1315

約数の個数: 40

約数和(自身を含む): 47802744

約数和(自身を除く): 27346664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 241, 482, 964, 1061, 1205, 1928, 2122, 2410, 3856, 4244, 4820, 5305, 8488, 9640, 10610, 16976, 19280, 21220, 42440, 84880, 255701, 511402, 1022804, 1278505, 2045608, 2557010, 4091216, 5114020, 10228040, 20456080]

約数ペア:

[(1, 20456080), (2, 10228040), (4, 5114020), (5, 4091216), (8, 2557010), (10, 2045608), (16, 1278505), (20, 1022804), (40, 511402), (80, 255701), (241, 84880), (482, 42440), (964, 21220), (1061, 19280), (1205, 16976), (1928, 10610), (2122, 9640), (2410, 8488), (3856, 5305), (4244, 4820)]