17981275

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{907}}^1$

素因数の和:991

約数の個数: 24

約数和(自身を含む): 24432464

約数和(自身を除く): 6451189

約数列:

[1, 5, 13, 25, 61, 65, 305, 325, 793, 907, 1525, 3965, 4535, 11791, 19825, 22675, 55327, 58955, 276635, 294775, 719251, 1383175, 3596255, 17981275]

約数ペア:

[(1, 17981275), (5, 3596255), (13, 1383175), (25, 719251), (61, 294775), (65, 276635), (305, 58955), (325, 55327), (793, 22675), (907, 19825), (1525, 11791), (3965, 4535)]