21256640

素因数分解:

$2^6\times 5^1\times {\mathrm{181}}^1\times {\mathrm{367}}^1$

素因数の和:565

約数の個数: 56

約数和(自身を含む): 51035712

約数和(自身を除く): 29779072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 181, 320, 362, 367, 724, 734, 905, 1448, 1468, 1810, 1835, 2896, 2936, 3620, 3670, 5792, 5872, 7240, 7340, 11584, 11744, 14480, 14680, 23488, 28960, 29360, 57920, 58720, 66427, 117440, 132854, 265708, 332135, 531416, 664270, 1062832, 1328540, 2125664, 2657080, 4251328, 5314160, 10628320, 21256640]

約数ペア:

[(1, 21256640), (2, 10628320), (4, 5314160), (5, 4251328), (8, 2657080), (10, 2125664), (16, 1328540), (20, 1062832), (32, 664270), (40, 531416), (64, 332135), (80, 265708), (160, 132854), (181, 117440), (320, 66427), (362, 58720), (367, 57920), (724, 29360), (734, 28960), (905, 23488), (1448, 14680), (1468, 14480), (1810, 11744), (1835, 11584), (2896, 7340), (2936, 7240), (3620, 5872), (3670, 5792)]