18885815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{233}}^1$

素因数の和:323

約数の個数: 32

約数和(自身を含む): 25945920

約数和(自身を除く): 7060105

約数列:

[1, 5, 13, 29, 43, 65, 145, 215, 233, 377, 559, 1165, 1247, 1885, 2795, 3029, 6235, 6757, 10019, 15145, 16211, 33785, 50095, 81055, 87841, 130247, 290551, 439205, 651235, 1452755, 3777163, 18885815]

約数ペア:

[(1, 18885815), (5, 3777163), (13, 1452755), (29, 651235), (43, 439205), (65, 290551), (145, 130247), (215, 87841), (233, 81055), (377, 50095), (559, 33785), (1165, 16211), (1247, 15145), (1885, 10019), (2795, 6757), (3029, 6235)]