21857560

素因数分解:

$2^3\times 5^1\times {\mathrm{181}}^1\times {\mathrm{3019}}^1$

素因数の和:3211

約数の個数: 32

約数和(自身を含む): 49467600

約数和(自身を除く): 27610040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 181, 362, 724, 905, 1448, 1810, 3019, 3620, 6038, 7240, 12076, 15095, 24152, 30190, 60380, 120760, 546439, 1092878, 2185756, 2732195, 4371512, 5464390, 10928780, 21857560]

約数ペア:

[(1, 21857560), (2, 10928780), (4, 5464390), (5, 4371512), (8, 2732195), (10, 2185756), (20, 1092878), (40, 546439), (181, 120760), (362, 60380), (724, 30190), (905, 24152), (1448, 15095), (1810, 12076), (3019, 7240), (3620, 6038)]