408020840

素因数分解:

$2^3\times 5^1\times {\mathrm{10200521}}^1$

素因数の和:10200532

約数の個数: 16

約数和(自身を含む): 918046980

約数和(自身を除く): 510026140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 10200521, 20401042, 40802084, 51002605, 81604168, 102005210, 204010420, 408020840]

約数ペア:

[(1, 408020840), (2, 204010420), (4, 102005210), (5, 81604168), (8, 51002605), (10, 40802084), (20, 20401042), (40, 10200521)]