1280452840

素因数分解:

$2^3\times 5^1\times {\mathrm{809}}^1\times {\mathrm{39569}}^1$

素因数の和:40389

約数の個数: 32

約数和(自身を含む): 2884653000

約数和(自身を除く): 1604200160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 809, 1618, 3236, 4045, 6472, 8090, 16180, 32360, 39569, 79138, 158276, 197845, 316552, 395690, 791380, 1582760, 32011321, 64022642, 128045284, 160056605, 256090568, 320113210, 640226420, 1280452840]

約数ペア:

[(1, 1280452840), (2, 640226420), (4, 320113210), (5, 256090568), (8, 160056605), (10, 128045284), (20, 64022642), (40, 32011321), (809, 1582760), (1618, 791380), (3236, 395690), (4045, 316552), (6472, 197845), (8090, 158276), (16180, 79138), (32360, 39569)]