20817375

素因数分解:

$3^1\times 5^3\times {\mathrm{43}}^1\times {\mathrm{1291}}^1$

素因数の和:1352

約数の個数: 32

約数和(自身を含む): 35473152

約数和(自身を除く): 14655777

約数列:

[1, 3, 5, 15, 25, 43, 75, 125, 129, 215, 375, 645, 1075, 1291, 3225, 3873, 5375, 6455, 16125, 19365, 32275, 55513, 96825, 161375, 166539, 277565, 484125, 832695, 1387825, 4163475, 6939125, 20817375]

約数ペア:

[(1, 20817375), (3, 6939125), (5, 4163475), (15, 1387825), (25, 832695), (43, 484125), (75, 277565), (125, 166539), (129, 161375), (215, 96825), (375, 55513), (645, 32275), (1075, 19365), (1291, 16125), (3225, 6455), (3873, 5375)]