397880440

素因数分解:

$2^3\times 5^1\times {\mathrm{9947011}}^1$

素因数の和:9947022

約数の個数: 16

約数和(自身を含む): 895231080

約数和(自身を除く): 497350640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 9947011, 19894022, 39788044, 49735055, 79576088, 99470110, 198940220, 397880440]

約数ペア:

[(1, 397880440), (2, 198940220), (4, 99470110), (5, 79576088), (8, 49735055), (10, 39788044), (20, 19894022), (40, 9947011)]