18937160

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{223}}^1$

素因数の和:438

約数の個数: 64

約数和(自身を含む): 46932480

約数和(自身を除く): 27995320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 193, 220, 223, 386, 440, 446, 772, 892, 965, 1115, 1544, 1784, 1930, 2123, 2230, 2453, 3860, 4246, 4460, 4906, 7720, 8492, 8920, 9812, 10615, 12265, 16984, 19624, 21230, 24530, 42460, 43039, 49060, 84920, 86078, 98120, 172156, 215195, 344312, 430390, 473429, 860780, 946858, 1721560, 1893716, 2367145, 3787432, 4734290, 9468580, 18937160]

約数ペア:

[(1, 18937160), (2, 9468580), (4, 4734290), (5, 3787432), (8, 2367145), (10, 1893716), (11, 1721560), (20, 946858), (22, 860780), (40, 473429), (44, 430390), (55, 344312), (88, 215195), (110, 172156), (193, 98120), (220, 86078), (223, 84920), (386, 49060), (440, 43039), (446, 42460), (772, 24530), (892, 21230), (965, 19624), (1115, 16984), (1544, 12265), (1784, 10615), (1930, 9812), (2123, 8920), (2230, 8492), (2453, 7720), (3860, 4906), (4246, 4460)]