21062980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13331}}^1$

素因数の和:13419

約数の個数: 24

約数和(自身を含む): 44795520

約数和(自身を除く): 23732540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13331, 26662, 53324, 66655, 133310, 266620, 1053149, 2106298, 4212596, 5265745, 10531490, 21062980]

約数ペア:

[(1, 21062980), (2, 10531490), (4, 5265745), (5, 4212596), (10, 2106298), (20, 1053149), (79, 266620), (158, 133310), (316, 66655), (395, 53324), (790, 26662), (1580, 13331)]