20157328

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{1087}}^1$

素因数の和:1175

約数の個数: 40

約数和(自身を含む): 41822720

約数和(自身を除く): 21665392

約数列:

[1, 2, 4, 8, 16, 19, 38, 61, 76, 122, 152, 244, 304, 488, 976, 1087, 1159, 2174, 2318, 4348, 4636, 8696, 9272, 17392, 18544, 20653, 41306, 66307, 82612, 132614, 165224, 265228, 330448, 530456, 1060912, 1259833, 2519666, 5039332, 10078664, 20157328]

約数ペア:

[(1, 20157328), (2, 10078664), (4, 5039332), (8, 2519666), (16, 1259833), (19, 1060912), (38, 530456), (61, 330448), (76, 265228), (122, 165224), (152, 132614), (244, 82612), (304, 66307), (488, 41306), (976, 20653), (1087, 18544), (1159, 17392), (2174, 9272), (2318, 8696), (4348, 4636)]