21880265

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{313}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 30385152

約数和(自身を除く): 8504887

約数列:

[1, 5, 11, 31, 41, 55, 155, 205, 313, 341, 451, 1271, 1565, 1705, 2255, 3443, 6355, 9703, 12833, 13981, 17215, 48515, 64165, 69905, 106733, 141163, 397823, 533665, 705815, 1989115, 4376053, 21880265]

約数ペア:

[(1, 21880265), (5, 4376053), (11, 1989115), (31, 705815), (41, 533665), (55, 397823), (155, 141163), (205, 106733), (313, 69905), (341, 64165), (451, 48515), (1271, 17215), (1565, 13981), (1705, 12833), (2255, 9703), (3443, 6355)]