20103920

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{3181}}^1$

素因数の和:3273

約数の個数: 40

約数和(自身を含む): 47348160

約数和(自身を除く): 27244240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 3181, 6320, 6362, 12724, 15905, 25448, 31810, 50896, 63620, 127240, 251299, 254480, 502598, 1005196, 1256495, 2010392, 2512990, 4020784, 5025980, 10051960, 20103920]

約数ペア:

[(1, 20103920), (2, 10051960), (4, 5025980), (5, 4020784), (8, 2512990), (10, 2010392), (16, 1256495), (20, 1005196), (40, 502598), (79, 254480), (80, 251299), (158, 127240), (316, 63620), (395, 50896), (632, 31810), (790, 25448), (1264, 15905), (1580, 12724), (3160, 6362), (3181, 6320)]