18349175

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:180

約数の個数: 36

約数和(自身を含む): 25460424

約数和(自身を除く): 7111249

約数列:

[1, 5, 13, 25, 43, 65, 101, 169, 215, 325, 505, 559, 845, 1075, 1313, 2525, 2795, 4225, 4343, 6565, 7267, 13975, 17069, 21715, 32825, 36335, 56459, 85345, 108575, 181675, 282295, 426725, 733967, 1411475, 3669835, 18349175]

約数ペア:

[(1, 18349175), (5, 3669835), (13, 1411475), (25, 733967), (43, 426725), (65, 282295), (101, 181675), (169, 108575), (215, 85345), (325, 56459), (505, 36335), (559, 32825), (845, 21715), (1075, 17069), (1313, 13975), (2525, 7267), (2795, 6565), (4225, 4343)]