21265180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{523}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 47537280

約数和(自身を除く): 26272100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 107, 190, 214, 380, 428, 523, 535, 1046, 1070, 2033, 2092, 2140, 2615, 4066, 5230, 8132, 9937, 10165, 10460, 19874, 20330, 39748, 40660, 49685, 55961, 99370, 111922, 198740, 223844, 279805, 559610, 1063259, 1119220, 2126518, 4253036, 5316295, 10632590, 21265180]

約数ペア:

[(1, 21265180), (2, 10632590), (4, 5316295), (5, 4253036), (10, 2126518), (19, 1119220), (20, 1063259), (38, 559610), (76, 279805), (95, 223844), (107, 198740), (190, 111922), (214, 99370), (380, 55961), (428, 49685), (523, 40660), (535, 39748), (1046, 20330), (1070, 19874), (2033, 10460), (2092, 10165), (2140, 9937), (2615, 8132), (4066, 5230)]