19217990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{239}}^1$

素因数の和:317

約数の個数: 64

約数和(自身を含む): 41057280

約数和(自身を除く): 21839290

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 43, 55, 85, 86, 110, 170, 187, 215, 239, 374, 430, 473, 478, 731, 935, 946, 1195, 1462, 1870, 2365, 2390, 2629, 3655, 4063, 4730, 5258, 7310, 8041, 8126, 10277, 13145, 16082, 20315, 20554, 26290, 40205, 40630, 44693, 51385, 80410, 89386, 102770, 113047, 174709, 223465, 226094, 349418, 446930, 565235, 873545, 1130470, 1747090, 1921799, 3843598, 9608995, 19217990]

約数ペア:

[(1, 19217990), (2, 9608995), (5, 3843598), (10, 1921799), (11, 1747090), (17, 1130470), (22, 873545), (34, 565235), (43, 446930), (55, 349418), (85, 226094), (86, 223465), (110, 174709), (170, 113047), (187, 102770), (215, 89386), (239, 80410), (374, 51385), (430, 44693), (473, 40630), (478, 40205), (731, 26290), (935, 20554), (946, 20315), (1195, 16082), (1462, 13145), (1870, 10277), (2365, 8126), (2390, 8041), (2629, 7310), (3655, 5258), (4063, 4730)]