20407959

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 35197344

約数和(自身を除く): 14789385

約数列:

[1, 3, 9, 11, 13, 33, 39, 99, 101, 117, 143, 157, 303, 429, 471, 909, 1111, 1287, 1313, 1413, 1727, 2041, 3333, 3939, 5181, 6123, 9999, 11817, 14443, 15543, 15857, 18369, 22451, 43329, 47571, 67353, 129987, 142713, 174427, 202059, 206141, 523281, 618423, 1569843, 1855269, 2267551, 6802653, 20407959]

約数ペア:

[(1, 20407959), (3, 6802653), (9, 2267551), (11, 1855269), (13, 1569843), (33, 618423), (39, 523281), (99, 206141), (101, 202059), (117, 174427), (143, 142713), (157, 129987), (303, 67353), (429, 47571), (471, 43329), (909, 22451), (1111, 18369), (1287, 15857), (1313, 15543), (1413, 14443), (1727, 11817), (2041, 9999), (3333, 6123), (3939, 5181)]