20904650

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1109}}^1$

素因数の和:1163

約数の個数: 48

約数和(自身を含む): 43356600

約数和(自身を除く): 22451950

約数列:

[1, 2, 5, 10, 13, 25, 26, 29, 50, 58, 65, 130, 145, 290, 325, 377, 650, 725, 754, 1109, 1450, 1885, 2218, 3770, 5545, 9425, 11090, 14417, 18850, 27725, 28834, 32161, 55450, 64322, 72085, 144170, 160805, 321610, 360425, 418093, 720850, 804025, 836186, 1608050, 2090465, 4180930, 10452325, 20904650]

約数ペア:

[(1, 20904650), (2, 10452325), (5, 4180930), (10, 2090465), (13, 1608050), (25, 836186), (26, 804025), (29, 720850), (50, 418093), (58, 360425), (65, 321610), (130, 160805), (145, 144170), (290, 72085), (325, 64322), (377, 55450), (650, 32161), (725, 28834), (754, 27725), (1109, 18850), (1450, 14417), (1885, 11090), (2218, 9425), (3770, 5545)]