18890780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{30469}}^1$

素因数の和:30509

約数の個数: 24

約数和(自身を含む): 40951680

約数和(自身を除く): 22060900

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 30469, 60938, 121876, 152345, 304690, 609380, 944539, 1889078, 3778156, 4722695, 9445390, 18890780]

約数ペア:

[(1, 18890780), (2, 9445390), (4, 4722695), (5, 3778156), (10, 1889078), (20, 944539), (31, 609380), (62, 304690), (124, 152345), (155, 121876), (310, 60938), (620, 30469)]