20145220

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{5113}}^1$

素因数の和:5319

約数の個数: 24

約数和(自身を含む): 42528024

約数和(自身を除く): 22382804

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 5113, 10226, 20452, 25565, 51130, 102260, 1007261, 2014522, 4029044, 5036305, 10072610, 20145220]

約数ペア:

[(1, 20145220), (2, 10072610), (4, 5036305), (5, 4029044), (10, 2014522), (20, 1007261), (197, 102260), (394, 51130), (788, 25565), (985, 20452), (1970, 10226), (3940, 5113)]