400076840

素因数分解:

$2^3\times 5^1\times {\mathrm{10001921}}^1$

素因数の和:10001932

約数の個数: 16

約数和(自身を含む): 900172980

約数和(自身を除く): 500096140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 10001921, 20003842, 40007684, 50009605, 80015368, 100019210, 200038420, 400076840]

約数ペア:

[(1, 400076840), (2, 200038420), (4, 100019210), (5, 80015368), (8, 50009605), (10, 40007684), (20, 20003842), (40, 10001921)]