21978110

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:138

約数の個数: 128

約数和(自身を含む): 55240704

約数和(自身を除く): 33262594

約数列:

[1, 2, 5, 7, 10, 11, 14, 17, 22, 23, 34, 35, 46, 55, 70, 73, 77, 85, 110, 115, 119, 146, 154, 161, 170, 187, 230, 238, 253, 322, 365, 374, 385, 391, 506, 511, 595, 730, 770, 782, 803, 805, 935, 1022, 1190, 1241, 1265, 1309, 1606, 1610, 1679, 1771, 1870, 1955, 2482, 2530, 2555, 2618, 2737, 3358, 3542, 3910, 4015, 4301, 5110, 5474, 5621, 6205, 6545, 8030, 8395, 8602, 8687, 8855, 11242, 11753, 12410, 13090, 13651, 13685, 16790, 17374, 17710, 18469, 21505, 23506, 27302, 27370, 28105, 28543, 30107, 36938, 43010, 43435, 56210, 57086, 58765, 60214, 68255, 86870, 92345, 95557, 117530, 129283, 136510, 142715, 150535, 184690, 191114, 199801, 258566, 285430, 301070, 313973, 399602, 477785, 627946, 646415, 955570, 999005, 1292830, 1569865, 1998010, 2197811, 3139730, 4395622, 10989055, 21978110]

約数ペア:

[(1, 21978110), (2, 10989055), (5, 4395622), (7, 3139730), (10, 2197811), (11, 1998010), (14, 1569865), (17, 1292830), (22, 999005), (23, 955570), (34, 646415), (35, 627946), (46, 477785), (55, 399602), (70, 313973), (73, 301070), (77, 285430), (85, 258566), (110, 199801), (115, 191114), (119, 184690), (146, 150535), (154, 142715), (161, 136510), (170, 129283), (187, 117530), (230, 95557), (238, 92345), (253, 86870), (322, 68255), (365, 60214), (374, 58765), (385, 57086), (391, 56210), (506, 43435), (511, 43010), (595, 36938), (730, 30107), (770, 28543), (782, 28105), (803, 27370), (805, 27302), (935, 23506), (1022, 21505), (1190, 18469), (1241, 17710), (1265, 17374), (1309, 16790), (1606, 13685), (1610, 13651), (1679, 13090), (1771, 12410), (1870, 11753), (1955, 11242), (2482, 8855), (2530, 8687), (2555, 8602), (2618, 8395), (2737, 8030), (3358, 6545), (3542, 6205), (3910, 5621), (4015, 5474), (4301, 5110)]