21000844809

素因数分解:

$3^4\times 7^1\times {\mathrm{109}}^1\times {\mathrm{373}}^1\times {\mathrm{911}}^1$

素因数の和:1412

約数の個数: 80

約数和(自身を含む): 36319050240

約数和(自身を除く): 15318205431

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 109, 189, 327, 373, 567, 763, 911, 981, 1119, 2289, 2611, 2733, 2943, 3357, 6377, 6867, 7833, 8199, 8829, 10071, 19131, 20601, 23499, 24597, 30213, 40657, 57393, 61803, 70497, 73791, 99299, 121971, 172179, 211491, 284599, 297897, 339803, 365913, 516537, 695093, 853797, 893691, 1019409, 1097739, 2085279, 2378621, 2561391, 2681073, 3058227, 3293217, 6255837, 7135863, 7684173, 8043219, 9174681, 18767511, 21407589, 23052519, 27524043, 37038527, 56302533, 64222767, 111115581, 192668301, 259269689, 333346743, 777809067, 1000040229, 2333427201, 3000120687, 7000281603, 21000844809]

約数ペア:

[(1, 21000844809), (3, 7000281603), (7, 3000120687), (9, 2333427201), (21, 1000040229), (27, 777809067), (63, 333346743), (81, 259269689), (109, 192668301), (189, 111115581), (327, 64222767), (373, 56302533), (567, 37038527), (763, 27524043), (911, 23052519), (981, 21407589), (1119, 18767511), (2289, 9174681), (2611, 8043219), (2733, 7684173), (2943, 7135863), (3357, 6255837), (6377, 3293217), (6867, 3058227), (7833, 2681073), (8199, 2561391), (8829, 2378621), (10071, 2085279), (19131, 1097739), (20601, 1019409), (23499, 893691), (24597, 853797), (30213, 695093), (40657, 516537), (57393, 365913), (61803, 339803), (70497, 297897), (73791, 284599), (99299, 211491), (121971, 172179)]