81147320

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{28573}}^1$

素因数の和:28655

約数の個数: 32

約数和(自身を含む): 185159520

約数和(自身を除く): 104012200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 28573, 57146, 114292, 142865, 228584, 285730, 571460, 1142920, 2028683, 4057366, 8114732, 10143415, 16229464, 20286830, 40573660, 81147320]

約数ペア:

[(1, 81147320), (2, 40573660), (4, 20286830), (5, 16229464), (8, 10143415), (10, 8114732), (20, 4057366), (40, 2028683), (71, 1142920), (142, 571460), (284, 285730), (355, 228584), (568, 142865), (710, 114292), (1420, 57146), (2840, 28573)]