21720151178

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{292181}}^1$

素因数の和:292334

約数の個数: 32

約数和(自身を含む): 37025303040

約数和(自身を除く): 15305151862

約数列:

[1, 2, 11, 22, 31, 62, 109, 218, 341, 682, 1199, 2398, 3379, 6758, 37169, 74338, 292181, 584362, 3213991, 6427982, 9057611, 18115222, 31847729, 63695458, 99633721, 199267442, 350325019, 700650038, 987279599, 1974559198, 10860075589, 21720151178]

約数ペア:

[(1, 21720151178), (2, 10860075589), (11, 1974559198), (22, 987279599), (31, 700650038), (62, 350325019), (109, 199267442), (218, 99633721), (341, 63695458), (682, 31847729), (1199, 18115222), (2398, 9057611), (3379, 6427982), (6758, 3213991), (37169, 584362), (74338, 292181)]