128515875

素因数分解:

$3^1\times 5^3\times {\mathrm{389}}^1\times {\mathrm{881}}^1$

素因数の和:1288

約数の個数: 32

約数和(自身を含む): 214643520

約数和(自身を除く): 86127645

約数列:

[1, 3, 5, 15, 25, 75, 125, 375, 389, 881, 1167, 1945, 2643, 4405, 5835, 9725, 13215, 22025, 29175, 48625, 66075, 110125, 145875, 330375, 342709, 1028127, 1713545, 5140635, 8567725, 25703175, 42838625, 128515875]

約数ペア:

[(1, 128515875), (3, 42838625), (5, 25703175), (15, 8567725), (25, 5140635), (75, 1713545), (125, 1028127), (375, 342709), (389, 330375), (881, 145875), (1167, 110125), (1945, 66075), (2643, 48625), (4405, 29175), (5835, 22025), (9725, 13215)]