20701275

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:201

約数の個数: 72

約数和(自身を含む): 41050944

約数和(自身を除く): 20349669

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 43, 49, 75, 105, 129, 131, 147, 175, 215, 245, 301, 393, 525, 645, 655, 735, 903, 917, 1075, 1225, 1505, 1965, 2107, 2751, 3225, 3275, 3675, 4515, 4585, 5633, 6321, 6419, 7525, 9825, 10535, 13755, 16899, 19257, 22575, 22925, 28165, 31605, 32095, 39431, 52675, 68775, 84495, 96285, 118293, 140825, 158025, 160475, 197155, 276017, 422475, 481425, 591465, 828051, 985775, 1380085, 2957325, 4140255, 6900425, 20701275]

約数ペア:

[(1, 20701275), (3, 6900425), (5, 4140255), (7, 2957325), (15, 1380085), (21, 985775), (25, 828051), (35, 591465), (43, 481425), (49, 422475), (75, 276017), (105, 197155), (129, 160475), (131, 158025), (147, 140825), (175, 118293), (215, 96285), (245, 84495), (301, 68775), (393, 52675), (525, 39431), (645, 32095), (655, 31605), (735, 28165), (903, 22925), (917, 22575), (1075, 19257), (1225, 16899), (1505, 13755), (1965, 10535), (2107, 9825), (2751, 7525), (3225, 6419), (3275, 6321), (3675, 5633), (4515, 4585)]