20629973

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:225

約数の個数: 32

約数和(自身を含む): 26836992

約数和(自身を除く): 6207019

約数列:

[1, 7, 13, 31, 71, 91, 103, 217, 403, 497, 721, 923, 1339, 2201, 2821, 3193, 6461, 7313, 9373, 15407, 22351, 28613, 41509, 51191, 95069, 200291, 226703, 290563, 665483, 1586921, 2947139, 20629973]

約数ペア:

[(1, 20629973), (7, 2947139), (13, 1586921), (31, 665483), (71, 290563), (91, 226703), (103, 200291), (217, 95069), (403, 51191), (497, 41509), (721, 28613), (923, 22351), (1339, 15407), (2201, 9373), (2821, 7313), (3193, 6461)]