21318285

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{571}}^1$

素因数の和:729

約数の個数: 32

約数和(自身を含む): 36241920

約数和(自身を除く): 14923635

約数列:

[1, 3, 5, 15, 19, 57, 95, 131, 285, 393, 571, 655, 1713, 1965, 2489, 2855, 7467, 8565, 10849, 12445, 32547, 37335, 54245, 74801, 162735, 224403, 374005, 1122015, 1421219, 4263657, 7106095, 21318285]

約数ペア:

[(1, 21318285), (3, 7106095), (5, 4263657), (15, 1421219), (19, 1122015), (57, 374005), (95, 224403), (131, 162735), (285, 74801), (393, 54245), (571, 37335), (655, 32547), (1713, 12445), (1965, 10849), (2489, 8565), (2855, 7467)]