81149720

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{27791}}^1$

素因数の和:27875

約数の個数: 32

約数和(自身を含む): 185094720

約数和(自身を除く): 103945000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 27791, 55582, 111164, 138955, 222328, 277910, 555820, 1111640, 2028743, 4057486, 8114972, 10143715, 16229944, 20287430, 40574860, 81149720]

約数ペア:

[(1, 81149720), (2, 40574860), (4, 20287430), (5, 16229944), (8, 10143715), (10, 8114972), (20, 4057486), (40, 2028743), (73, 1111640), (146, 555820), (292, 277910), (365, 222328), (584, 138955), (730, 111164), (1460, 55582), (2920, 27791)]