18820880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{18097}}^1$

素因数の和:18123

約数の個数: 40

約数和(自身を含む): 47127192

約数和(自身を除く): 28306312

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 18097, 36194, 72388, 90485, 144776, 180970, 235261, 289552, 361940, 470522, 723880, 941044, 1176305, 1447760, 1882088, 2352610, 3764176, 4705220, 9410440, 18820880]

約数ペア:

[(1, 18820880), (2, 9410440), (4, 4705220), (5, 3764176), (8, 2352610), (10, 1882088), (13, 1447760), (16, 1176305), (20, 941044), (26, 723880), (40, 470522), (52, 361940), (65, 289552), (80, 235261), (104, 180970), (130, 144776), (208, 90485), (260, 72388), (520, 36194), (1040, 18097)]