19720085

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1$

素因数の和:194

約数の個数: 64

約数和(自身を含む): 32845824

約数和(自身を除く): 13125739

約数列:

[1, 5, 7, 11, 17, 23, 35, 55, 77, 85, 115, 119, 131, 161, 187, 253, 385, 391, 595, 655, 805, 917, 935, 1265, 1309, 1441, 1771, 1955, 2227, 2737, 3013, 4301, 4585, 6545, 7205, 8855, 10087, 11135, 13685, 15065, 15589, 21091, 21505, 24497, 30107, 33143, 50435, 51221, 77945, 105455, 122485, 150535, 165715, 171479, 232001, 256105, 358547, 563431, 857395, 1160005, 1792735, 2817155, 3944017, 19720085]

約数ペア:

[(1, 19720085), (5, 3944017), (7, 2817155), (11, 1792735), (17, 1160005), (23, 857395), (35, 563431), (55, 358547), (77, 256105), (85, 232001), (115, 171479), (119, 165715), (131, 150535), (161, 122485), (187, 105455), (253, 77945), (385, 51221), (391, 50435), (595, 33143), (655, 30107), (805, 24497), (917, 21505), (935, 21091), (1265, 15589), (1309, 15065), (1441, 13685), (1771, 11135), (1955, 10087), (2227, 8855), (2737, 7205), (3013, 6545), (4301, 4585)]