81661990

素因数分解:

$2^1\times 5^1\times {\mathrm{1931}}^1\times {\mathrm{4229}}^1$

素因数の和:6167

約数の個数: 16

約数和(自身を含む): 147102480

約数和(自身を除く): 65440490

約数列:

[1, 2, 5, 10, 1931, 3862, 4229, 8458, 9655, 19310, 21145, 42290, 8166199, 16332398, 40830995, 81661990]

約数ペア:

[(1, 81661990), (2, 40830995), (5, 16332398), (10, 8166199), (1931, 42290), (3862, 21145), (4229, 19310), (8458, 9655)]