12920240

素因数分解:

$2^4\times 5^1\times {\mathrm{161503}}^1$

素因数の和:161516

約数の個数: 20

約数和(自身を含む): 30039744

約数和(自身を除く): 17119504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 161503, 323006, 646012, 807515, 1292024, 1615030, 2584048, 3230060, 6460120, 12920240]

約数ペア:

[(1, 12920240), (2, 6460120), (4, 3230060), (5, 2584048), (8, 1615030), (10, 1292024), (16, 807515), (20, 646012), (40, 323006), (80, 161503)]