68647120

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{20929}}^1$

素因数の和:20983

約数の個数: 40

約数和(自身を含む): 163505160

約数和(自身を除く): 94858040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 20929, 41858, 83716, 104645, 167432, 209290, 334864, 418580, 837160, 858089, 1674320, 1716178, 3432356, 4290445, 6864712, 8580890, 13729424, 17161780, 34323560, 68647120]

約数ペア:

[(1, 68647120), (2, 34323560), (4, 17161780), (5, 13729424), (8, 8580890), (10, 6864712), (16, 4290445), (20, 3432356), (40, 1716178), (41, 1674320), (80, 858089), (82, 837160), (164, 418580), (205, 334864), (328, 209290), (410, 167432), (656, 104645), (820, 83716), (1640, 41858), (3280, 20929)]