399950

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:452

約数の個数: 24

約数和(自身を含む): 784920

約数和(自身を除く): 384970

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 95, 190, 421, 475, 842, 950, 2105, 4210, 7999, 10525, 15998, 21050, 39995, 79990, 199975, 399950]

約数ペア:

[(1, 399950), (2, 199975), (5, 79990), (10, 39995), (19, 21050), (25, 15998), (38, 10525), (50, 7999), (95, 4210), (190, 2105), (421, 950), (475, 842)]