18895840

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{6947}}^1$

素因数の和:6979

約数の個数: 48

約数和(自身を含む): 47274192

約数和(自身を除く): 28378352

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 6947, 13894, 27788, 34735, 55576, 69470, 111152, 118099, 138940, 222304, 236198, 277880, 472396, 555760, 590495, 944792, 1111520, 1180990, 1889584, 2361980, 3779168, 4723960, 9447920, 18895840]

約数ペア:

[(1, 18895840), (2, 9447920), (4, 4723960), (5, 3779168), (8, 2361980), (10, 1889584), (16, 1180990), (17, 1111520), (20, 944792), (32, 590495), (34, 555760), (40, 472396), (68, 277880), (80, 236198), (85, 222304), (136, 138940), (160, 118099), (170, 111152), (272, 69470), (340, 55576), (544, 34735), (680, 27788), (1360, 13894), (2720, 6947)]