21178700

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:219

約数の個数: 72

約数和(自身を含む): 48694800

約数和(自身を除く): 27516100

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 67, 100, 109, 116, 134, 145, 218, 268, 290, 335, 436, 545, 580, 670, 725, 1090, 1340, 1450, 1675, 1943, 2180, 2725, 2900, 3161, 3350, 3886, 5450, 6322, 6700, 7303, 7772, 9715, 10900, 12644, 14606, 15805, 19430, 29212, 31610, 36515, 38860, 48575, 63220, 73030, 79025, 97150, 146060, 158050, 182575, 194300, 211787, 316100, 365150, 423574, 730300, 847148, 1058935, 2117870, 4235740, 5294675, 10589350, 21178700]

約数ペア:

[(1, 21178700), (2, 10589350), (4, 5294675), (5, 4235740), (10, 2117870), (20, 1058935), (25, 847148), (29, 730300), (50, 423574), (58, 365150), (67, 316100), (100, 211787), (109, 194300), (116, 182575), (134, 158050), (145, 146060), (218, 97150), (268, 79025), (290, 73030), (335, 63220), (436, 48575), (545, 38860), (580, 36515), (670, 31610), (725, 29212), (1090, 19430), (1340, 15805), (1450, 14606), (1675, 12644), (1943, 10900), (2180, 9715), (2725, 7772), (2900, 7303), (3161, 6700), (3350, 6322), (3886, 5450)]