20768125

素因数分解:

$5^4\times 7^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1$

素因数の和:175

約数の個数: 40

約数和(自身を含む): 30590208

約数和(自身を除く): 9822083

約数列:

[1, 5, 7, 25, 35, 47, 101, 125, 175, 235, 329, 505, 625, 707, 875, 1175, 1645, 2525, 3535, 4375, 4747, 5875, 8225, 12625, 17675, 23735, 29375, 33229, 41125, 63125, 88375, 118675, 166145, 205625, 441875, 593375, 830725, 2966875, 4153625, 20768125]

約数ペア:

[(1, 20768125), (5, 4153625), (7, 2966875), (25, 830725), (35, 593375), (47, 441875), (101, 205625), (125, 166145), (175, 118675), (235, 88375), (329, 63125), (505, 41125), (625, 33229), (707, 29375), (875, 23735), (1175, 17675), (1645, 12625), (2525, 8225), (3535, 5875), (4375, 4747)]