20120440

素因数分解:

$2^3\times 5^1\times {\mathrm{677}}^1\times {\mathrm{743}}^1$

素因数の和:1431

約数の個数: 32

約数和(自身を含む): 45398880

約数和(自身を除く): 25278440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 677, 743, 1354, 1486, 2708, 2972, 3385, 3715, 5416, 5944, 6770, 7430, 13540, 14860, 27080, 29720, 503011, 1006022, 2012044, 2515055, 4024088, 5030110, 10060220, 20120440]

約数ペア:

[(1, 20120440), (2, 10060220), (4, 5030110), (5, 4024088), (8, 2515055), (10, 2012044), (20, 1006022), (40, 503011), (677, 29720), (743, 27080), (1354, 14860), (1486, 13540), (2708, 7430), (2972, 6770), (3385, 5944), (3715, 5416)]