20780750

素因数分解:

$2^1\times 5^3\times {\mathrm{101}}^1\times {\mathrm{823}}^1$

素因数の和:941

約数の個数: 32

約数和(自身を含む): 39334464

約数和(自身を除く): 18553714

約数列:

[1, 2, 5, 10, 25, 50, 101, 125, 202, 250, 505, 823, 1010, 1646, 2525, 4115, 5050, 8230, 12625, 20575, 25250, 41150, 83123, 102875, 166246, 205750, 415615, 831230, 2078075, 4156150, 10390375, 20780750]

約数ペア:

[(1, 20780750), (2, 10390375), (5, 4156150), (10, 2078075), (25, 831230), (50, 415615), (101, 205750), (125, 166246), (202, 102875), (250, 83123), (505, 41150), (823, 25250), (1010, 20575), (1646, 12625), (2525, 8230), (4115, 5050)]