20315408

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{3931}}^1$

素因数の和:3975

約数の個数: 40

約数和(自身を含む): 43881120

約数和(自身を除く): 23565712

約数列:

[1, 2, 4, 8, 16, 17, 19, 34, 38, 68, 76, 136, 152, 272, 304, 323, 646, 1292, 2584, 3931, 5168, 7862, 15724, 31448, 62896, 66827, 74689, 133654, 149378, 267308, 298756, 534616, 597512, 1069232, 1195024, 1269713, 2539426, 5078852, 10157704, 20315408]

約数ペア:

[(1, 20315408), (2, 10157704), (4, 5078852), (8, 2539426), (16, 1269713), (17, 1195024), (19, 1069232), (34, 597512), (38, 534616), (68, 298756), (76, 267308), (136, 149378), (152, 133654), (272, 74689), (304, 66827), (323, 62896), (646, 31448), (1292, 15724), (2584, 7862), (3931, 5168)]