19871775

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:102

約数の個数: 144

約数和(自身を含む): 47044608

約数和(自身を除く): 27172833

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 25, 31, 33, 35, 37, 45, 55, 63, 75, 77, 93, 99, 105, 111, 155, 165, 175, 185, 217, 225, 231, 259, 275, 279, 315, 333, 341, 385, 407, 465, 495, 525, 555, 651, 693, 775, 777, 825, 925, 1023, 1085, 1147, 1155, 1221, 1295, 1395, 1575, 1665, 1705, 1925, 1953, 2035, 2325, 2331, 2387, 2475, 2775, 2849, 3069, 3255, 3441, 3465, 3663, 3885, 5115, 5425, 5735, 5775, 6105, 6475, 6975, 7161, 8029, 8325, 8525, 8547, 9765, 10175, 10323, 11655, 11935, 12617, 14245, 15345, 16275, 17205, 17325, 18315, 19425, 21483, 24087, 25575, 25641, 28675, 30525, 35805, 37851, 40145, 42735, 48825, 51615, 58275, 59675, 63085, 71225, 72261, 76725, 86025, 88319, 91575, 107415, 113553, 120435, 128205, 179025, 189255, 200725, 213675, 258075, 264957, 315425, 361305, 441595, 537075, 567765, 602175, 641025, 794871, 946275, 1324785, 1806525, 2207975, 2838825, 3974355, 6623925, 19871775]

約数ペア:

[(1, 19871775), (3, 6623925), (5, 3974355), (7, 2838825), (9, 2207975), (11, 1806525), (15, 1324785), (21, 946275), (25, 794871), (31, 641025), (33, 602175), (35, 567765), (37, 537075), (45, 441595), (55, 361305), (63, 315425), (75, 264957), (77, 258075), (93, 213675), (99, 200725), (105, 189255), (111, 179025), (155, 128205), (165, 120435), (175, 113553), (185, 107415), (217, 91575), (225, 88319), (231, 86025), (259, 76725), (275, 72261), (279, 71225), (315, 63085), (333, 59675), (341, 58275), (385, 51615), (407, 48825), (465, 42735), (495, 40145), (525, 37851), (555, 35805), (651, 30525), (693, 28675), (775, 25641), (777, 25575), (825, 24087), (925, 21483), (1023, 19425), (1085, 18315), (1147, 17325), (1155, 17205), (1221, 16275), (1295, 15345), (1395, 14245), (1575, 12617), (1665, 11935), (1705, 11655), (1925, 10323), (1953, 10175), (2035, 9765), (2325, 8547), (2331, 8525), (2387, 8325), (2475, 8029), (2775, 7161), (2849, 6975), (3069, 6475), (3255, 6105), (3441, 5775), (3465, 5735), (3663, 5425), (3885, 5115)]