20517276

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{151}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 52961664

約数和(自身を除く): 32444388

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 67, 78, 134, 151, 156, 169, 201, 268, 302, 338, 402, 453, 507, 604, 676, 804, 871, 906, 1014, 1742, 1812, 1963, 2028, 2613, 3484, 3926, 5226, 5889, 7852, 10117, 10452, 11323, 11778, 20234, 22646, 23556, 25519, 30351, 33969, 40468, 45292, 51038, 60702, 67938, 76557, 102076, 121404, 131521, 135876, 153114, 263042, 306228, 394563, 526084, 789126, 1578252, 1709773, 3419546, 5129319, 6839092, 10258638, 20517276]

約数ペア:

[(1, 20517276), (2, 10258638), (3, 6839092), (4, 5129319), (6, 3419546), (12, 1709773), (13, 1578252), (26, 789126), (39, 526084), (52, 394563), (67, 306228), (78, 263042), (134, 153114), (151, 135876), (156, 131521), (169, 121404), (201, 102076), (268, 76557), (302, 67938), (338, 60702), (402, 51038), (453, 45292), (507, 40468), (604, 33969), (676, 30351), (804, 25519), (871, 23556), (906, 22646), (1014, 20234), (1742, 11778), (1812, 11323), (1963, 10452), (2028, 10117), (2613, 7852), (3484, 5889), (3926, 5226)]