83780

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:139

約数の個数: 24

約数和(自身を含む): 181440

約数和(自身を除く): 97660

約数列:

[1, 2, 4, 5, 10, 20, 59, 71, 118, 142, 236, 284, 295, 355, 590, 710, 1180, 1420, 4189, 8378, 16756, 20945, 41890, 83780]

約数ペア:

[(1, 83780), (2, 41890), (4, 20945), (5, 16756), (10, 8378), (20, 4189), (59, 1420), (71, 1180), (118, 710), (142, 590), (236, 355), (284, 295)]