2561641360

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{405323}}^1$

素因数の和:405415

約数の個数: 40

約数和(自身を含む): 6031221120

約数和(自身を除く): 3469579760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 405323, 810646, 1621292, 2026615, 3242584, 4053230, 6485168, 8106460, 16212920, 32020517, 32425840, 64041034, 128082068, 160102585, 256164136, 320205170, 512328272, 640410340, 1280820680, 2561641360]

約数ペア:

[(1, 2561641360), (2, 1280820680), (4, 640410340), (5, 512328272), (8, 320205170), (10, 256164136), (16, 160102585), (20, 128082068), (40, 64041034), (79, 32425840), (80, 32020517), (158, 16212920), (316, 8106460), (395, 6485168), (632, 4053230), (790, 3242584), (1264, 2026615), (1580, 1621292), (3160, 810646), (6320, 405323)]