20985156

素因数分解:

$2^2\times 3^4\times {\mathrm{239}}^1\times {\mathrm{271}}^1$

素因数の和:526

約数の個数: 60

約数和(自身を含む): 55292160

約数和(自身を除く): 34307004

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 239, 271, 324, 478, 542, 717, 813, 956, 1084, 1434, 1626, 2151, 2439, 2868, 3252, 4302, 4878, 6453, 7317, 8604, 9756, 12906, 14634, 19359, 21951, 25812, 29268, 38718, 43902, 64769, 77436, 87804, 129538, 194307, 259076, 388614, 582921, 777228, 1165842, 1748763, 2331684, 3497526, 5246289, 6995052, 10492578, 20985156]

約数ペア:

[(1, 20985156), (2, 10492578), (3, 6995052), (4, 5246289), (6, 3497526), (9, 2331684), (12, 1748763), (18, 1165842), (27, 777228), (36, 582921), (54, 388614), (81, 259076), (108, 194307), (162, 129538), (239, 87804), (271, 77436), (324, 64769), (478, 43902), (542, 38718), (717, 29268), (813, 25812), (956, 21951), (1084, 19359), (1434, 14634), (1626, 12906), (2151, 9756), (2439, 8604), (2868, 7317), (3252, 6453), (4302, 4878)]