21885140

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{389}}^1$

素因数の和:524

約数の個数: 48

約数和(自身を含む): 48157200

約数和(自身を除く): 26272060

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 97, 116, 145, 194, 290, 388, 389, 485, 580, 778, 970, 1556, 1940, 1945, 2813, 3890, 5626, 7780, 11252, 11281, 14065, 22562, 28130, 37733, 45124, 56260, 56405, 75466, 112810, 150932, 188665, 225620, 377330, 754660, 1094257, 2188514, 4377028, 5471285, 10942570, 21885140]

約数ペア:

[(1, 21885140), (2, 10942570), (4, 5471285), (5, 4377028), (10, 2188514), (20, 1094257), (29, 754660), (58, 377330), (97, 225620), (116, 188665), (145, 150932), (194, 112810), (290, 75466), (388, 56405), (389, 56260), (485, 45124), (580, 37733), (778, 28130), (970, 22562), (1556, 14065), (1940, 11281), (1945, 11252), (2813, 7780), (3890, 5626)]