20399288

素因数分解:

$2^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{4003}}^1$

素因数の和:4036

約数の個数: 48

約数和(自身を含む): 47927880

約数和(自身を除く): 27528592

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 49, 52, 56, 91, 98, 104, 182, 196, 364, 392, 637, 728, 1274, 2548, 4003, 5096, 8006, 16012, 28021, 32024, 52039, 56042, 104078, 112084, 196147, 208156, 224168, 364273, 392294, 416312, 728546, 784588, 1457092, 1569176, 2549911, 2914184, 5099822, 10199644, 20399288]

約数ペア:

[(1, 20399288), (2, 10199644), (4, 5099822), (7, 2914184), (8, 2549911), (13, 1569176), (14, 1457092), (26, 784588), (28, 728546), (49, 416312), (52, 392294), (56, 364273), (91, 224168), (98, 208156), (104, 196147), (182, 112084), (196, 104078), (364, 56042), (392, 52039), (637, 32024), (728, 28021), (1274, 16012), (2548, 8006), (4003, 5096)]