20209527

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:181

約数の個数: 48

約数和(自身を含む): 33496320

約数和(自身を除く): 13286793

約数列:

[1, 3, 9, 13, 27, 39, 43, 103, 117, 129, 169, 309, 351, 387, 507, 559, 927, 1161, 1339, 1521, 1677, 2781, 4017, 4429, 4563, 5031, 7267, 12051, 13287, 15093, 17407, 21801, 36153, 39861, 52221, 57577, 65403, 119583, 156663, 172731, 196209, 469989, 518193, 748501, 1554579, 2245503, 6736509, 20209527]

約数ペア:

[(1, 20209527), (3, 6736509), (9, 2245503), (13, 1554579), (27, 748501), (39, 518193), (43, 469989), (103, 196209), (117, 172731), (129, 156663), (169, 119583), (309, 65403), (351, 57577), (387, 52221), (507, 39861), (559, 36153), (927, 21801), (1161, 17407), (1339, 15093), (1521, 13287), (1677, 12051), (2781, 7267), (4017, 5031), (4429, 4563)]