20639728

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{431}}^1$

素因数の和:553

約数の個数: 40

約数和(自身を含む): 41622336

約数和(自身を除く): 20982608

約数列:

[1, 2, 4, 8, 16, 41, 73, 82, 146, 164, 292, 328, 431, 584, 656, 862, 1168, 1724, 2993, 3448, 5986, 6896, 11972, 17671, 23944, 31463, 35342, 47888, 62926, 70684, 125852, 141368, 251704, 282736, 503408, 1289983, 2579966, 5159932, 10319864, 20639728]

約数ペア:

[(1, 20639728), (2, 10319864), (4, 5159932), (8, 2579966), (16, 1289983), (41, 503408), (73, 282736), (82, 251704), (146, 141368), (164, 125852), (292, 70684), (328, 62926), (431, 47888), (584, 35342), (656, 31463), (862, 23944), (1168, 17671), (1724, 11972), (2993, 6896), (3448, 5986)]