31991193

素因数分解:

$3^5\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1$

素因数の和:101

約数の個数: 72

約数和(自身を含む): 55954080

約数和(自身を除く): 23962887

約数列:

[1, 3, 9, 13, 19, 27, 39, 41, 57, 81, 117, 123, 169, 171, 243, 247, 351, 369, 507, 513, 533, 741, 779, 1053, 1107, 1521, 1539, 1599, 2223, 2337, 3159, 3211, 3321, 4563, 4617, 4797, 6669, 6929, 7011, 9633, 9963, 10127, 13689, 14391, 20007, 20787, 21033, 28899, 30381, 41067, 43173, 60021, 62361, 63099, 86697, 91143, 129519, 131651, 187083, 189297, 260091, 273429, 394953, 561249, 780273, 820287, 1184859, 1683747, 2460861, 3554577, 10663731, 31991193]

約数ペア:

[(1, 31991193), (3, 10663731), (9, 3554577), (13, 2460861), (19, 1683747), (27, 1184859), (39, 820287), (41, 780273), (57, 561249), (81, 394953), (117, 273429), (123, 260091), (169, 189297), (171, 187083), (243, 131651), (247, 129519), (351, 91143), (369, 86697), (507, 63099), (513, 62361), (533, 60021), (741, 43173), (779, 41067), (1053, 30381), (1107, 28899), (1521, 21033), (1539, 20787), (1599, 20007), (2223, 14391), (2337, 13689), (3159, 10127), (3211, 9963), (3321, 9633), (4563, 7011), (4617, 6929), (4797, 6669)]