18420808

素因数分解:

$2^3\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:238

約数の個数: 64

約数和(自身を含む): 41368320

約数和(自身を除く): 22947512

約数列:

[1, 2, 4, 7, 8, 14, 28, 41, 56, 71, 82, 113, 142, 164, 226, 284, 287, 328, 452, 497, 568, 574, 791, 904, 994, 1148, 1582, 1988, 2296, 2911, 3164, 3976, 4633, 5822, 6328, 8023, 9266, 11644, 16046, 18532, 20377, 23288, 32092, 32431, 37064, 40754, 56161, 64184, 64862, 81508, 112322, 129724, 163016, 224644, 259448, 328943, 449288, 657886, 1315772, 2302601, 2631544, 4605202, 9210404, 18420808]

約数ペア:

[(1, 18420808), (2, 9210404), (4, 4605202), (7, 2631544), (8, 2302601), (14, 1315772), (28, 657886), (41, 449288), (56, 328943), (71, 259448), (82, 224644), (113, 163016), (142, 129724), (164, 112322), (226, 81508), (284, 64862), (287, 64184), (328, 56161), (452, 40754), (497, 37064), (568, 32431), (574, 32092), (791, 23288), (904, 20377), (994, 18532), (1148, 16046), (1582, 11644), (1988, 9266), (2296, 8023), (2911, 6328), (3164, 5822), (3976, 4633)]