18280405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{691}}^1$

素因数の和:757

約数の個数: 32

約数和(自身を含む): 26506368

約数和(自身を除く): 8225963

約数列:

[1, 5, 11, 13, 37, 55, 65, 143, 185, 407, 481, 691, 715, 2035, 2405, 3455, 5291, 7601, 8983, 25567, 26455, 38005, 44915, 98813, 127835, 281237, 332371, 494065, 1406185, 1661855, 3656081, 18280405]

約数ペア:

[(1, 18280405), (5, 3656081), (11, 1661855), (13, 1406185), (37, 494065), (55, 332371), (65, 281237), (143, 127835), (185, 98813), (407, 44915), (481, 38005), (691, 26455), (715, 25567), (2035, 8983), (2405, 7601), (3455, 5291)]