20800404

素因数分解:

$2^2\times 3^2\times {\mathrm{521}}^1\times {\mathrm{1109}}^1$

素因数の和:1640

約数の個数: 36

約数和(自身を含む): 52727220

約数和(自身を除く): 31926816

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 521, 1042, 1109, 1563, 2084, 2218, 3126, 3327, 4436, 4689, 6252, 6654, 9378, 9981, 13308, 18756, 19962, 39924, 577789, 1155578, 1733367, 2311156, 3466734, 5200101, 6933468, 10400202, 20800404]

約数ペア:

[(1, 20800404), (2, 10400202), (3, 6933468), (4, 5200101), (6, 3466734), (9, 2311156), (12, 1733367), (18, 1155578), (36, 577789), (521, 39924), (1042, 19962), (1109, 18756), (1563, 13308), (2084, 9981), (2218, 9378), (3126, 6654), (3327, 6252), (4436, 4689)]