81639580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{19531}}^1$

素因数の和:19570

約数の個数: 48

約数和(自身を含む): 196882560

約数和(自身を除く): 115242980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 19531, 39062, 78124, 97655, 195310, 214841, 371089, 390620, 429682, 742178, 859364, 1074205, 1484356, 1855445, 2148410, 3710890, 4081979, 4296820, 7421780, 8163958, 16327916, 20409895, 40819790, 81639580]

約数ペア:

[(1, 81639580), (2, 40819790), (4, 20409895), (5, 16327916), (10, 8163958), (11, 7421780), (19, 4296820), (20, 4081979), (22, 3710890), (38, 2148410), (44, 1855445), (55, 1484356), (76, 1074205), (95, 859364), (110, 742178), (190, 429682), (209, 390620), (220, 371089), (380, 214841), (418, 195310), (836, 97655), (1045, 78124), (2090, 39062), (4180, 19531)]