19997780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5347}}^1$

素因数の和:5384

約数の個数: 48

約数和(自身を含む): 48517056

約数和(自身を除く): 28519276

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 748, 935, 1870, 3740, 5347, 10694, 21388, 26735, 53470, 58817, 90899, 106940, 117634, 181798, 235268, 294085, 363596, 454495, 588170, 908990, 999889, 1176340, 1817980, 1999778, 3999556, 4999445, 9998890, 19997780]

約数ペア:

[(1, 19997780), (2, 9998890), (4, 4999445), (5, 3999556), (10, 1999778), (11, 1817980), (17, 1176340), (20, 999889), (22, 908990), (34, 588170), (44, 454495), (55, 363596), (68, 294085), (85, 235268), (110, 181798), (170, 117634), (187, 106940), (220, 90899), (340, 58817), (374, 53470), (748, 26735), (935, 21388), (1870, 10694), (3740, 5347)]