21003873

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{241}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 32524800

約数和(自身を除く): 11520927

約数列:

[1, 3, 11, 19, 33, 57, 139, 209, 241, 417, 627, 723, 1529, 2641, 2651, 4579, 4587, 7923, 7953, 13737, 29051, 33499, 50369, 87153, 100497, 151107, 368489, 636481, 1105467, 1909443, 7001291, 21003873]

約数ペア:

[(1, 21003873), (3, 7001291), (11, 1909443), (19, 1105467), (33, 636481), (57, 368489), (139, 151107), (209, 100497), (241, 87153), (417, 50369), (627, 33499), (723, 29051), (1529, 13737), (2641, 7953), (2651, 7923), (4579, 4587)]