8721520

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{2659}}^1$

素因数の和:2713

約数の個数: 40

約数和(自身を含む): 20779920

約数和(自身を除く): 12058400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 2659, 3280, 5318, 10636, 13295, 21272, 26590, 42544, 53180, 106360, 109019, 212720, 218038, 436076, 545095, 872152, 1090190, 1744304, 2180380, 4360760, 8721520]

約数ペア:

[(1, 8721520), (2, 4360760), (4, 2180380), (5, 1744304), (8, 1090190), (10, 872152), (16, 545095), (20, 436076), (40, 218038), (41, 212720), (80, 109019), (82, 106360), (164, 53180), (205, 42544), (328, 26590), (410, 21272), (656, 13295), (820, 10636), (1640, 5318), (2659, 3280)]