21139040

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10163}}^1$

素因数の和:10191

約数の個数: 48

約数和(自身を含む): 53787888

約数和(自身を除く): 32648848

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10163, 20326, 40652, 50815, 81304, 101630, 132119, 162608, 203260, 264238, 325216, 406520, 528476, 660595, 813040, 1056952, 1321190, 1626080, 2113904, 2642380, 4227808, 5284760, 10569520, 21139040]

約数ペア:

[(1, 21139040), (2, 10569520), (4, 5284760), (5, 4227808), (8, 2642380), (10, 2113904), (13, 1626080), (16, 1321190), (20, 1056952), (26, 813040), (32, 660595), (40, 528476), (52, 406520), (65, 325216), (80, 264238), (104, 203260), (130, 162608), (160, 132119), (208, 101630), (260, 81304), (416, 50815), (520, 40652), (1040, 20326), (2080, 10163)]