21321335

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{457}}^1$

素因数の和:543

約数の個数: 32

約数和(自身を含む): 30953472

約数和(自身を除く): 9632137

約数列:

[1, 5, 7, 31, 35, 43, 155, 215, 217, 301, 457, 1085, 1333, 1505, 2285, 3199, 6665, 9331, 14167, 15995, 19651, 46655, 70835, 98255, 99169, 137557, 495845, 609181, 687785, 3045905, 4264267, 21321335]

約数ペア:

[(1, 21321335), (5, 4264267), (7, 3045905), (31, 687785), (35, 609181), (43, 495845), (155, 137557), (215, 99169), (217, 98255), (301, 70835), (457, 46655), (1085, 19651), (1333, 15995), (1505, 14167), (2285, 9331), (3199, 6665)]