20625003

素因数分解:

$3^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:169

約数の個数: 64

約数和(自身を含む): 37324800

約数和(自身を除く): 16699797

約数列:

[1, 3, 7, 9, 21, 27, 29, 53, 63, 71, 87, 159, 189, 203, 213, 261, 371, 477, 497, 609, 639, 783, 1113, 1431, 1491, 1537, 1827, 1917, 2059, 3339, 3763, 4473, 4611, 5481, 6177, 10017, 10759, 11289, 13419, 13833, 14413, 18531, 26341, 32277, 33867, 41499, 43239, 55593, 79023, 96831, 101601, 109127, 129717, 237069, 290493, 327381, 389151, 711207, 763889, 982143, 2291667, 2946429, 6875001, 20625003]

約数ペア:

[(1, 20625003), (3, 6875001), (7, 2946429), (9, 2291667), (21, 982143), (27, 763889), (29, 711207), (53, 389151), (63, 327381), (71, 290493), (87, 237069), (159, 129717), (189, 109127), (203, 101601), (213, 96831), (261, 79023), (371, 55593), (477, 43239), (497, 41499), (609, 33867), (639, 32277), (783, 26341), (1113, 18531), (1431, 14413), (1491, 13833), (1537, 13419), (1827, 11289), (1917, 10759), (2059, 10017), (3339, 6177), (3763, 5481), (4473, 4611)]