20087991

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1$

素因数の和:173

約数の個数: 72

約数和(自身を含む): 38093328

約数和(自身を除く): 18005337

約数列:

[1, 3, 7, 9, 11, 21, 33, 41, 49, 63, 77, 99, 101, 123, 147, 231, 287, 303, 369, 441, 451, 539, 693, 707, 861, 909, 1111, 1353, 1617, 2009, 2121, 2583, 3157, 3333, 4059, 4141, 4851, 4949, 6027, 6363, 7777, 9471, 9999, 12423, 14847, 18081, 22099, 23331, 28413, 28987, 37269, 44541, 45551, 54439, 66297, 69993, 86961, 136653, 163317, 198891, 202909, 260883, 318857, 409959, 489951, 608727, 956571, 1826181, 2231999, 2869713, 6695997, 20087991]

約数ペア:

[(1, 20087991), (3, 6695997), (7, 2869713), (9, 2231999), (11, 1826181), (21, 956571), (33, 608727), (41, 489951), (49, 409959), (63, 318857), (77, 260883), (99, 202909), (101, 198891), (123, 163317), (147, 136653), (231, 86961), (287, 69993), (303, 66297), (369, 54439), (441, 45551), (451, 44541), (539, 37269), (693, 28987), (707, 28413), (861, 23331), (909, 22099), (1111, 18081), (1353, 14847), (1617, 12423), (2009, 9999), (2121, 9471), (2583, 7777), (3157, 6363), (3333, 6027), (4059, 4949), (4141, 4851)]