18780275

素因数分解:

$5^2\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1$

素因数の和:383

約数の個数: 24

約数和(自身を含む): 24313920

約数和(自身を除く): 5533645

約数列:

[1, 5, 25, 37, 79, 185, 257, 395, 925, 1285, 1975, 2923, 6425, 9509, 14615, 20303, 47545, 73075, 101515, 237725, 507575, 751211, 3756055, 18780275]

約数ペア:

[(1, 18780275), (5, 3756055), (25, 751211), (37, 507575), (79, 237725), (185, 101515), (257, 73075), (395, 47545), (925, 20303), (1285, 14615), (1975, 9509), (2923, 6425)]