21901012

素因数分解:

$2^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{9901}}^1$

素因数の和:9991

約数の個数: 24

約数和(自身を含む): 44360960

約数和(自身を除く): 22459948

約数列:

[1, 2, 4, 7, 14, 28, 79, 158, 316, 553, 1106, 2212, 9901, 19802, 39604, 69307, 138614, 277228, 782179, 1564358, 3128716, 5475253, 10950506, 21901012]

約数ペア:

[(1, 21901012), (2, 10950506), (4, 5475253), (7, 3128716), (14, 1564358), (28, 782179), (79, 277228), (158, 138614), (316, 69307), (553, 39604), (1106, 19802), (2212, 9901)]