67181780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{81929}}^1$

素因数の和:81979

約数の個数: 24

約数和(自身を含む): 144524520

約数和(自身を除く): 77342740

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 81929, 163858, 327716, 409645, 819290, 1638580, 3359089, 6718178, 13436356, 16795445, 33590890, 67181780]

約数ペア:

[(1, 67181780), (2, 33590890), (4, 16795445), (5, 13436356), (10, 6718178), (20, 3359089), (41, 1638580), (82, 819290), (164, 409645), (205, 327716), (410, 163858), (820, 81929)]