21390992

素因数分解:

$2^4\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:208

約数の個数: 80

約数和(自身を含む): 50187264

約数和(自身を除く): 28796272

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 31, 56, 61, 62, 101, 112, 122, 124, 202, 217, 244, 248, 404, 427, 434, 488, 496, 707, 808, 854, 868, 976, 1414, 1616, 1708, 1736, 1891, 2828, 3131, 3416, 3472, 3782, 5656, 6161, 6262, 6832, 7564, 11312, 12322, 12524, 13237, 15128, 21917, 24644, 25048, 26474, 30256, 43127, 43834, 49288, 50096, 52948, 86254, 87668, 98576, 105896, 172508, 175336, 190991, 211792, 345016, 350672, 381982, 690032, 763964, 1336937, 1527928, 2673874, 3055856, 5347748, 10695496, 21390992]

約数ペア:

[(1, 21390992), (2, 10695496), (4, 5347748), (7, 3055856), (8, 2673874), (14, 1527928), (16, 1336937), (28, 763964), (31, 690032), (56, 381982), (61, 350672), (62, 345016), (101, 211792), (112, 190991), (122, 175336), (124, 172508), (202, 105896), (217, 98576), (244, 87668), (248, 86254), (404, 52948), (427, 50096), (434, 49288), (488, 43834), (496, 43127), (707, 30256), (808, 26474), (854, 25048), (868, 24644), (976, 21917), (1414, 15128), (1616, 13237), (1708, 12524), (1736, 12322), (1891, 11312), (2828, 7564), (3131, 6832), (3416, 6262), (3472, 6161), (3782, 5656)]