21620180

素因数分解:

$2^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{7159}}^1$

素因数の和:7319

約数の個数: 24

約数和(自身を含む): 45709440

約数和(自身を除く): 24089260

約数列:

[1, 2, 4, 5, 10, 20, 151, 302, 604, 755, 1510, 3020, 7159, 14318, 28636, 35795, 71590, 143180, 1081009, 2162018, 4324036, 5405045, 10810090, 21620180]

約数ペア:

[(1, 21620180), (2, 10810090), (4, 5405045), (5, 4324036), (10, 2162018), (20, 1081009), (151, 143180), (302, 71590), (604, 35795), (755, 28636), (1510, 14318), (3020, 7159)]