81268760

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{9629}}^1$

素因数の和:9851

約数の個数: 32

約数和(自身を含む): 183740400

約数和(自身を除く): 102471640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 4220, 8440, 9629, 19258, 38516, 48145, 77032, 96290, 192580, 385160, 2031719, 4063438, 8126876, 10158595, 16253752, 20317190, 40634380, 81268760]

約数ペア:

[(1, 81268760), (2, 40634380), (4, 20317190), (5, 16253752), (8, 10158595), (10, 8126876), (20, 4063438), (40, 2031719), (211, 385160), (422, 192580), (844, 96290), (1055, 77032), (1688, 48145), (2110, 38516), (4220, 19258), (8440, 9629)]