28004405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{739}}^1$

素因数の和:821

約数の個数: 32

約数和(自身を含む): 40279680

約数和(自身を除く): 12275275

約数列:

[1, 5, 11, 13, 53, 55, 65, 143, 265, 583, 689, 715, 739, 2915, 3445, 3695, 7579, 8129, 9607, 37895, 39167, 40645, 48035, 105677, 195835, 430837, 509171, 528385, 2154185, 2545855, 5600881, 28004405]

約数ペア:

[(1, 28004405), (5, 5600881), (11, 2545855), (13, 2154185), (53, 528385), (55, 509171), (65, 430837), (143, 195835), (265, 105677), (583, 48035), (689, 40645), (715, 39167), (739, 37895), (2915, 9607), (3445, 8129), (3695, 7579)]