21095020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17291}}^1$

素因数の和:17361

約数の個数: 24

約数和(自身を含む): 45028368

約数和(自身を除く): 23933348

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17291, 34582, 69164, 86455, 172910, 345820, 1054751, 2109502, 4219004, 5273755, 10547510, 21095020]

約数ペア:

[(1, 21095020), (2, 10547510), (4, 5273755), (5, 4219004), (10, 2109502), (20, 1054751), (61, 345820), (122, 172910), (244, 86455), (305, 69164), (610, 34582), (1220, 17291)]