20989278

素因数分解:

$2^1\times 3^2\times {\mathrm{139}}^1\times {\mathrm{8389}}^1$

素因数の和:8536

約数の個数: 24

約数和(自身を含む): 45809400

約数和(自身を除く): 24820122

約数列:

[1, 2, 3, 6, 9, 18, 139, 278, 417, 834, 1251, 2502, 8389, 16778, 25167, 50334, 75501, 151002, 1166071, 2332142, 3498213, 6996426, 10494639, 20989278]

約数ペア:

[(1, 20989278), (2, 10494639), (3, 6996426), (6, 3498213), (9, 2332142), (18, 1166071), (139, 151002), (278, 75501), (417, 50334), (834, 25167), (1251, 16778), (2502, 8389)]