21651875

素因数分解:

$5^4\times 7^3\times {\mathrm{101}}^1$

素因数の和:142

約数の個数: 40

約数和(自身を含む): 31864800

約数和(自身を除く): 10212925

約数列:

[1, 5, 7, 25, 35, 49, 101, 125, 175, 245, 343, 505, 625, 707, 875, 1225, 1715, 2525, 3535, 4375, 4949, 6125, 8575, 12625, 17675, 24745, 30625, 34643, 42875, 63125, 88375, 123725, 173215, 214375, 441875, 618625, 866075, 3093125, 4330375, 21651875]

約数ペア:

[(1, 21651875), (5, 4330375), (7, 3093125), (25, 866075), (35, 618625), (49, 441875), (101, 214375), (125, 173215), (175, 123725), (245, 88375), (343, 63125), (505, 42875), (625, 34643), (707, 30625), (875, 24745), (1225, 17675), (1715, 12625), (2525, 8575), (3535, 6125), (4375, 4949)]