19877240

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:264

約数の個数: 64

約数和(自身を含む): 46569600

約数和(自身を除く): 26692360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 97, 109, 188, 194, 218, 235, 376, 388, 436, 470, 485, 545, 776, 872, 940, 970, 1090, 1880, 1940, 2180, 3880, 4360, 4559, 5123, 9118, 10246, 10573, 18236, 20492, 21146, 22795, 25615, 36472, 40984, 42292, 45590, 51230, 52865, 84584, 91180, 102460, 105730, 182360, 204920, 211460, 422920, 496931, 993862, 1987724, 2484655, 3975448, 4969310, 9938620, 19877240]

約数ペア:

[(1, 19877240), (2, 9938620), (4, 4969310), (5, 3975448), (8, 2484655), (10, 1987724), (20, 993862), (40, 496931), (47, 422920), (94, 211460), (97, 204920), (109, 182360), (188, 105730), (194, 102460), (218, 91180), (235, 84584), (376, 52865), (388, 51230), (436, 45590), (470, 42292), (485, 40984), (545, 36472), (776, 25615), (872, 22795), (940, 21146), (970, 20492), (1090, 18236), (1880, 10573), (1940, 10246), (2180, 9118), (3880, 5123), (4360, 4559)]