20494630

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{181}}^1$

素因数の和:281

約数の個数: 48

約数和(自身を含む): 40766544

約数和(自身を除く): 20271914

約数列:

[1, 2, 5, 10, 13, 26, 65, 67, 130, 134, 169, 181, 335, 338, 362, 670, 845, 871, 905, 1690, 1742, 1810, 2353, 4355, 4706, 8710, 11323, 11765, 12127, 22646, 23530, 24254, 30589, 56615, 60635, 61178, 113230, 121270, 152945, 157651, 305890, 315302, 788255, 1576510, 2049463, 4098926, 10247315, 20494630]

約数ペア:

[(1, 20494630), (2, 10247315), (5, 4098926), (10, 2049463), (13, 1576510), (26, 788255), (65, 315302), (67, 305890), (130, 157651), (134, 152945), (169, 121270), (181, 113230), (335, 61178), (338, 60635), (362, 56615), (670, 30589), (845, 24254), (871, 23530), (905, 22646), (1690, 12127), (1742, 11765), (1810, 11323), (2353, 8710), (4355, 4706)]