21499527

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{821}}^1$

素因数の和:903

約数の個数: 32

約数和(自身を含む): 34721280

約数和(自身を除く): 13221753

約数列:

[1, 3, 7, 21, 29, 43, 87, 129, 203, 301, 609, 821, 903, 1247, 2463, 3741, 5747, 8729, 17241, 23809, 26187, 35303, 71427, 105909, 166663, 247121, 499989, 741363, 1023787, 3071361, 7166509, 21499527]

約数ペア:

[(1, 21499527), (3, 7166509), (7, 3071361), (21, 1023787), (29, 741363), (43, 499989), (87, 247121), (129, 166663), (203, 105909), (301, 71427), (609, 35303), (821, 26187), (903, 23809), (1247, 17241), (2463, 8729), (3741, 5747)]