21179375

素因数分解:

$5^4\times 7^1\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:177

約数の個数: 40

約数和(自身を含む): 31190016

約数和(自身を除く): 10010641

約数列:

[1, 5, 7, 25, 35, 47, 103, 125, 175, 235, 329, 515, 625, 721, 875, 1175, 1645, 2575, 3605, 4375, 4841, 5875, 8225, 12875, 18025, 24205, 29375, 33887, 41125, 64375, 90125, 121025, 169435, 205625, 450625, 605125, 847175, 3025625, 4235875, 21179375]

約数ペア:

[(1, 21179375), (5, 4235875), (7, 3025625), (25, 847175), (35, 605125), (47, 450625), (103, 205625), (125, 169435), (175, 121025), (235, 90125), (329, 64375), (515, 41125), (625, 33887), (721, 29375), (875, 24205), (1175, 18025), (1645, 12875), (2575, 8225), (3605, 5875), (4375, 4841)]