20781796

素因数分解:

$2^2\times 7^1\times {\mathrm{251}}^1\times {\mathrm{2957}}^1$

素因数の和:3219

約数の個数: 24

約数和(自身を含む): 41743296

約数和(自身を除く): 20961500

約数列:

[1, 2, 4, 7, 14, 28, 251, 502, 1004, 1757, 2957, 3514, 5914, 7028, 11828, 20699, 41398, 82796, 742207, 1484414, 2968828, 5195449, 10390898, 20781796]

約数ペア:

[(1, 20781796), (2, 10390898), (4, 5195449), (7, 2968828), (14, 1484414), (28, 742207), (251, 82796), (502, 41398), (1004, 20699), (1757, 11828), (2957, 7028), (3514, 5914)]