28170920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{367}}^1$

素因数の和:498

約数の個数: 64

約数和(自身を含む): 67564800

約数和(自身を除く): 39393880

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 101, 152, 190, 202, 367, 380, 404, 505, 734, 760, 808, 1010, 1468, 1835, 1919, 2020, 2936, 3670, 3838, 4040, 6973, 7340, 7676, 9595, 13946, 14680, 15352, 19190, 27892, 34865, 37067, 38380, 55784, 69730, 74134, 76760, 139460, 148268, 185335, 278920, 296536, 370670, 704273, 741340, 1408546, 1482680, 2817092, 3521365, 5634184, 7042730, 14085460, 28170920]

約数ペア:

[(1, 28170920), (2, 14085460), (4, 7042730), (5, 5634184), (8, 3521365), (10, 2817092), (19, 1482680), (20, 1408546), (38, 741340), (40, 704273), (76, 370670), (95, 296536), (101, 278920), (152, 185335), (190, 148268), (202, 139460), (367, 76760), (380, 74134), (404, 69730), (505, 55784), (734, 38380), (760, 37067), (808, 34865), (1010, 27892), (1468, 19190), (1835, 15352), (1919, 14680), (2020, 13946), (2936, 9595), (3670, 7676), (3838, 7340), (4040, 6973)]