20991558

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{4423}}^1$

素因数の和:4548

約数の個数: 32

約数和(自身を含む): 48416256

約数和(自身を除く): 27424698

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 113, 226, 339, 678, 791, 1582, 2373, 4423, 4746, 8846, 13269, 26538, 30961, 61922, 92883, 185766, 499799, 999598, 1499397, 2998794, 3498593, 6997186, 10495779, 20991558]

約数ペア:

[(1, 20991558), (2, 10495779), (3, 6997186), (6, 3498593), (7, 2998794), (14, 1499397), (21, 999598), (42, 499799), (113, 185766), (226, 92883), (339, 61922), (678, 30961), (791, 26538), (1582, 13269), (2373, 8846), (4423, 4746)]