21140379

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{113}}^1$

素因数の和:189

約数の個数: 48

約数和(自身を含む): 35048160

約数和(自身を除く): 13907781

約数列:

[1, 3, 9, 13, 27, 39, 41, 113, 117, 123, 169, 339, 351, 369, 507, 533, 1017, 1107, 1469, 1521, 1599, 3051, 4407, 4563, 4633, 4797, 6929, 13221, 13899, 14391, 19097, 20787, 39663, 41697, 57291, 60229, 62361, 125091, 171873, 180687, 187083, 515619, 542061, 782977, 1626183, 2348931, 7046793, 21140379]

約数ペア:

[(1, 21140379), (3, 7046793), (9, 2348931), (13, 1626183), (27, 782977), (39, 542061), (41, 515619), (113, 187083), (117, 180687), (123, 171873), (169, 125091), (339, 62361), (351, 60229), (369, 57291), (507, 41697), (533, 39663), (1017, 20787), (1107, 19097), (1469, 14391), (1521, 13899), (1599, 13221), (3051, 6929), (4407, 4797), (4563, 4633)]