20390776

素因数分解:

$2^3\times 7^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1$

素因数の和:244

約数の個数: 64

約数和(自身を含む): 45722880

約数和(自身を除く): 25332104

約数列:

[1, 2, 4, 7, 8, 14, 28, 41, 56, 82, 83, 107, 164, 166, 214, 287, 328, 332, 428, 574, 581, 664, 749, 856, 1148, 1162, 1498, 2296, 2324, 2996, 3403, 4387, 4648, 5992, 6806, 8774, 8881, 13612, 17548, 17762, 23821, 27224, 30709, 35096, 35524, 47642, 61418, 62167, 71048, 95284, 122836, 124334, 190568, 245672, 248668, 364121, 497336, 728242, 1456484, 2548847, 2912968, 5097694, 10195388, 20390776]

約数ペア:

[(1, 20390776), (2, 10195388), (4, 5097694), (7, 2912968), (8, 2548847), (14, 1456484), (28, 728242), (41, 497336), (56, 364121), (82, 248668), (83, 245672), (107, 190568), (164, 124334), (166, 122836), (214, 95284), (287, 71048), (328, 62167), (332, 61418), (428, 47642), (574, 35524), (581, 35096), (664, 30709), (749, 27224), (856, 23821), (1148, 17762), (1162, 17548), (1498, 13612), (2296, 8881), (2324, 8774), (2996, 6806), (3403, 5992), (4387, 4648)]