21709040

素因数分解:

$2^4\times 5^1\times {\mathrm{271363}}^1$

素因数の和:271376

約数の個数: 20

約数和(自身を含む): 50473704

約数和(自身を除く): 28764664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271363, 542726, 1085452, 1356815, 2170904, 2713630, 4341808, 5427260, 10854520, 21709040]

約数ペア:

[(1, 21709040), (2, 10854520), (4, 5427260), (5, 4341808), (8, 2713630), (10, 2170904), (16, 1356815), (20, 1085452), (40, 542726), (80, 271363)]