20585840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{157}}^1$

素因数の和:330

約数の個数: 80

約数和(自身を含む): 52898400

約数和(自身を除く): 32312560

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 149, 157, 176, 220, 298, 314, 440, 596, 628, 745, 785, 880, 1192, 1256, 1490, 1570, 1639, 1727, 2384, 2512, 2980, 3140, 3278, 3454, 5960, 6280, 6556, 6908, 8195, 8635, 11920, 12560, 13112, 13816, 16390, 17270, 23393, 26224, 27632, 32780, 34540, 46786, 65560, 69080, 93572, 116965, 131120, 138160, 187144, 233930, 257323, 374288, 467860, 514646, 935720, 1029292, 1286615, 1871440, 2058584, 2573230, 4117168, 5146460, 10292920, 20585840]

約数ペア:

[(1, 20585840), (2, 10292920), (4, 5146460), (5, 4117168), (8, 2573230), (10, 2058584), (11, 1871440), (16, 1286615), (20, 1029292), (22, 935720), (40, 514646), (44, 467860), (55, 374288), (80, 257323), (88, 233930), (110, 187144), (149, 138160), (157, 131120), (176, 116965), (220, 93572), (298, 69080), (314, 65560), (440, 46786), (596, 34540), (628, 32780), (745, 27632), (785, 26224), (880, 23393), (1192, 17270), (1256, 16390), (1490, 13816), (1570, 13112), (1639, 12560), (1727, 11920), (2384, 8635), (2512, 8195), (2980, 6908), (3140, 6556), (3278, 6280), (3454, 5960)]