19001020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{13381}}^1$

素因数の和:13461

約数の個数: 24

約数和(自身を含む): 40467168

約数和(自身を除く): 21466148

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 13381, 26762, 53524, 66905, 133810, 267620, 950051, 1900102, 3800204, 4750255, 9500510, 19001020]

約数ペア:

[(1, 19001020), (2, 9500510), (4, 4750255), (5, 3800204), (10, 1900102), (20, 950051), (71, 267620), (142, 133810), (284, 66905), (355, 53524), (710, 26762), (1420, 13381)]