20508205

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:277

約数の個数: 32

約数和(自身を含む): 27675648

約数和(自身を除く): 7167443

約数列:

[1, 5, 17, 31, 43, 85, 155, 181, 215, 527, 731, 905, 1333, 2635, 3077, 3655, 5611, 6665, 7783, 15385, 22661, 28055, 38915, 95387, 113305, 132311, 241273, 476935, 661555, 1206365, 4101641, 20508205]

約数ペア:

[(1, 20508205), (5, 4101641), (17, 1206365), (31, 661555), (43, 476935), (85, 241273), (155, 132311), (181, 113305), (215, 95387), (527, 38915), (731, 28055), (905, 22661), (1333, 15385), (2635, 7783), (3077, 6665), (3655, 5611)]