21580540

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{20359}}^1$

素因数の和:20421

約数の個数: 24

約数和(自身を含む): 46176480

約数和(自身を除く): 24595940

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 20359, 40718, 81436, 101795, 203590, 407180, 1079027, 2158054, 4316108, 5395135, 10790270, 21580540]

約数ペア:

[(1, 21580540), (2, 10790270), (4, 5395135), (5, 4316108), (10, 2158054), (20, 1079027), (53, 407180), (106, 203590), (212, 101795), (265, 81436), (530, 40718), (1060, 20359)]