21489489

素因数分解:

$3^3\times 7^2\times {\mathrm{37}}^1\times {\mathrm{439}}^1$

素因数の和:499

約数の個数: 48

約数和(自身を含む): 38121600

約数和(自身を除く): 16632111

約数列:

[1, 3, 7, 9, 21, 27, 37, 49, 63, 111, 147, 189, 259, 333, 439, 441, 777, 999, 1317, 1323, 1813, 2331, 3073, 3951, 5439, 6993, 9219, 11853, 16243, 16317, 21511, 27657, 48729, 48951, 64533, 82971, 113701, 146187, 193599, 341103, 438561, 580797, 795907, 1023309, 2387721, 3069927, 7163163, 21489489]

約数ペア:

[(1, 21489489), (3, 7163163), (7, 3069927), (9, 2387721), (21, 1023309), (27, 795907), (37, 580797), (49, 438561), (63, 341103), (111, 193599), (147, 146187), (189, 113701), (259, 82971), (333, 64533), (439, 48951), (441, 48729), (777, 27657), (999, 21511), (1317, 16317), (1323, 16243), (1813, 11853), (2331, 9219), (3073, 6993), (3951, 5439)]