81956840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{292703}}^1$

素因数の和:292721

約数の個数: 32

約数和(自身を含む): 210746880

約数和(自身を除く): 128790040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 292703, 585406, 1170812, 1463515, 2048921, 2341624, 2927030, 4097842, 5854060, 8195684, 10244605, 11708120, 16391368, 20489210, 40978420, 81956840]

約数ペア:

[(1, 81956840), (2, 40978420), (4, 20489210), (5, 16391368), (7, 11708120), (8, 10244605), (10, 8195684), (14, 5854060), (20, 4097842), (28, 2927030), (35, 2341624), (40, 2048921), (56, 1463515), (70, 1170812), (140, 585406), (280, 292703)]