21259755

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1481}}^1$

素因数の和:1532

約数の個数: 48

約数和(自身を含む): 41614560

約数和(自身を除く): 20354805

約数列:

[1, 3, 5, 9, 11, 15, 29, 33, 45, 55, 87, 99, 145, 165, 261, 319, 435, 495, 957, 1305, 1481, 1595, 2871, 4443, 4785, 7405, 13329, 14355, 16291, 22215, 42949, 48873, 66645, 81455, 128847, 146619, 214745, 244365, 386541, 472439, 644235, 733095, 1417317, 1932705, 2362195, 4251951, 7086585, 21259755]

約数ペア:

[(1, 21259755), (3, 7086585), (5, 4251951), (9, 2362195), (11, 1932705), (15, 1417317), (29, 733095), (33, 644235), (45, 472439), (55, 386541), (87, 244365), (99, 214745), (145, 146619), (165, 128847), (261, 81455), (319, 66645), (435, 48873), (495, 42949), (957, 22215), (1305, 16291), (1481, 14355), (1595, 13329), (2871, 7405), (4443, 4785)]