21490378

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{293}}^1$

素因数の和:359

約数の個数: 48

約数和(自身を含む): 41319936

約数和(自身を除く): 19829558

約数列:

[1, 2, 7, 13, 14, 26, 31, 62, 91, 169, 182, 217, 293, 338, 403, 434, 586, 806, 1183, 2051, 2366, 2821, 3809, 4102, 5239, 5642, 7618, 9083, 10478, 18166, 26663, 36673, 49517, 53326, 63581, 73346, 99034, 118079, 127162, 236158, 346619, 693238, 826553, 1535027, 1653106, 3070054, 10745189, 21490378]

約数ペア:

[(1, 21490378), (2, 10745189), (7, 3070054), (13, 1653106), (14, 1535027), (26, 826553), (31, 693238), (62, 346619), (91, 236158), (169, 127162), (182, 118079), (217, 99034), (293, 73346), (338, 63581), (403, 53326), (434, 49517), (586, 36673), (806, 26663), (1183, 18166), (2051, 10478), (2366, 9083), (2821, 7618), (3809, 5642), (4102, 5239)]