2561780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{167}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 5927040

約数和(自身を除く): 3365260

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 59, 65, 118, 130, 167, 236, 260, 295, 334, 590, 668, 767, 835, 1180, 1534, 1670, 2171, 3068, 3340, 3835, 4342, 7670, 8684, 9853, 10855, 15340, 19706, 21710, 39412, 43420, 49265, 98530, 128089, 197060, 256178, 512356, 640445, 1280890, 2561780]

約数ペア:

[(1, 2561780), (2, 1280890), (4, 640445), (5, 512356), (10, 256178), (13, 197060), (20, 128089), (26, 98530), (52, 49265), (59, 43420), (65, 39412), (118, 21710), (130, 19706), (167, 15340), (236, 10855), (260, 9853), (295, 8684), (334, 7670), (590, 4342), (668, 3835), (767, 3340), (835, 3068), (1180, 2171), (1534, 1670)]