408969940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{288007}}^1$

素因数の和:288087

約数の個数: 24

約数和(自身を含む): 870936192

約数和(自身を除く): 461966252

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 288007, 576014, 1152028, 1440035, 2880070, 5760140, 20448497, 40896994, 81793988, 102242485, 204484970, 408969940]

約数ペア:

[(1, 408969940), (2, 204484970), (4, 102242485), (5, 81793988), (10, 40896994), (20, 20448497), (71, 5760140), (142, 2880070), (284, 1440035), (355, 1152028), (710, 576014), (1420, 288007)]