20297840

素因数分解:

$2^4\times 5^1\times {\mathrm{349}}^1\times {\mathrm{727}}^1$

素因数の和:1089

約数の個数: 40

約数和(自身を含む): 47392800

約数和(自身を除く): 27094960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 349, 698, 727, 1396, 1454, 1745, 2792, 2908, 3490, 3635, 5584, 5816, 6980, 7270, 11632, 13960, 14540, 27920, 29080, 58160, 253723, 507446, 1014892, 1268615, 2029784, 2537230, 4059568, 5074460, 10148920, 20297840]

約数ペア:

[(1, 20297840), (2, 10148920), (4, 5074460), (5, 4059568), (8, 2537230), (10, 2029784), (16, 1268615), (20, 1014892), (40, 507446), (80, 253723), (349, 58160), (698, 29080), (727, 27920), (1396, 14540), (1454, 13960), (1745, 11632), (2792, 7270), (2908, 6980), (3490, 5816), (3635, 5584)]