21803800

素因数分解:

$2^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{2659}}^1$

素因数の和:2716

約数の個数: 48

約数和(自身を含む): 51949800

約数和(自身を除く): 30146000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 164, 200, 205, 328, 410, 820, 1025, 1640, 2050, 2659, 4100, 5318, 8200, 10636, 13295, 21272, 26590, 53180, 66475, 106360, 109019, 132950, 218038, 265900, 436076, 531800, 545095, 872152, 1090190, 2180380, 2725475, 4360760, 5450950, 10901900, 21803800]

約数ペア:

[(1, 21803800), (2, 10901900), (4, 5450950), (5, 4360760), (8, 2725475), (10, 2180380), (20, 1090190), (25, 872152), (40, 545095), (41, 531800), (50, 436076), (82, 265900), (100, 218038), (164, 132950), (200, 109019), (205, 106360), (328, 66475), (410, 53180), (820, 26590), (1025, 21272), (1640, 13295), (2050, 10636), (2659, 8200), (4100, 5318)]