20786415

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:168

約数の個数: 64

約数和(自身を含む): 38201856

約数和(自身を除く): 17415441

約数列:

[1, 3, 5, 13, 15, 37, 39, 43, 65, 67, 111, 129, 185, 195, 201, 215, 335, 481, 555, 559, 645, 871, 1005, 1443, 1591, 1677, 2405, 2479, 2613, 2795, 2881, 4355, 4773, 7215, 7437, 7955, 8385, 8643, 12395, 13065, 14405, 20683, 23865, 32227, 37185, 37453, 43215, 62049, 96681, 103415, 106597, 112359, 161135, 187265, 310245, 319791, 483405, 532985, 561795, 1385761, 1598955, 4157283, 6928805, 20786415]

約数ペア:

[(1, 20786415), (3, 6928805), (5, 4157283), (13, 1598955), (15, 1385761), (37, 561795), (39, 532985), (43, 483405), (65, 319791), (67, 310245), (111, 187265), (129, 161135), (185, 112359), (195, 106597), (201, 103415), (215, 96681), (335, 62049), (481, 43215), (555, 37453), (559, 37185), (645, 32227), (871, 23865), (1005, 20683), (1443, 14405), (1591, 13065), (1677, 12395), (2405, 8643), (2479, 8385), (2613, 7955), (2795, 7437), (2881, 7215), (4355, 4773)]