21393520

素因数分解:

$2^4\times 5^1\times {\mathrm{267419}}^1$

素因数の和:267432

約数の個数: 20

約数和(自身を含む): 49740120

約数和(自身を除く): 28346600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267419, 534838, 1069676, 1337095, 2139352, 2674190, 4278704, 5348380, 10696760, 21393520]

約数ペア:

[(1, 21393520), (2, 10696760), (4, 5348380), (5, 4278704), (8, 2674190), (10, 2139352), (16, 1337095), (20, 1069676), (40, 534838), (80, 267419)]