2171180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 5080320

約数和(自身を除く): 2909140

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 139, 142, 220, 278, 284, 355, 556, 695, 710, 781, 1390, 1420, 1529, 1562, 2780, 3058, 3124, 3905, 6116, 7645, 7810, 9869, 15290, 15620, 19738, 30580, 39476, 49345, 98690, 108559, 197380, 217118, 434236, 542795, 1085590, 2171180]

約数ペア:

[(1, 2171180), (2, 1085590), (4, 542795), (5, 434236), (10, 217118), (11, 197380), (20, 108559), (22, 98690), (44, 49345), (55, 39476), (71, 30580), (110, 19738), (139, 15620), (142, 15290), (220, 9869), (278, 7810), (284, 7645), (355, 6116), (556, 3905), (695, 3124), (710, 3058), (781, 2780), (1390, 1562), (1420, 1529)]