21749210

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1979}}^1$

素因数の和:2150

約数の個数: 32

約数和(自身を含む): 45048960

約数和(自身を除く): 23299750

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 157, 314, 785, 1099, 1570, 1979, 2198, 3958, 5495, 9895, 10990, 13853, 19790, 27706, 69265, 138530, 310703, 621406, 1553515, 2174921, 3107030, 4349842, 10874605, 21749210]

約数ペア:

[(1, 21749210), (2, 10874605), (5, 4349842), (7, 3107030), (10, 2174921), (14, 1553515), (35, 621406), (70, 310703), (157, 138530), (314, 69265), (785, 27706), (1099, 19790), (1570, 13853), (1979, 10990), (2198, 9895), (3958, 5495)]