21276843

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{557}}^1$

素因数の和:691

約数の個数: 32

約数和(自身を含む): 34712064

約数和(自身を除く): 13435221

約数列:

[1, 3, 7, 17, 21, 51, 107, 119, 321, 357, 557, 749, 1671, 1819, 2247, 3899, 5457, 9469, 11697, 12733, 28407, 38199, 59599, 66283, 178797, 198849, 417193, 1013183, 1251579, 3039549, 7092281, 21276843]

約数ペア:

[(1, 21276843), (3, 7092281), (7, 3039549), (17, 1251579), (21, 1013183), (51, 417193), (107, 198849), (119, 178797), (321, 66283), (357, 59599), (557, 38199), (749, 28407), (1671, 12733), (1819, 11697), (2247, 9469), (3899, 5457)]