21787017

素因数分解:

$3^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{683}}^1$

素因数の和:738

約数の個数: 32

約数和(自身を含む): 35020800

約数和(自身を除く): 13233783

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 343, 651, 683, 1029, 1519, 2049, 4557, 4781, 10633, 14343, 21173, 31899, 33467, 63519, 100401, 148211, 234269, 444633, 702807, 1037477, 3112431, 7262339, 21787017]

約数ペア:

[(1, 21787017), (3, 7262339), (7, 3112431), (21, 1037477), (31, 702807), (49, 444633), (93, 234269), (147, 148211), (217, 100401), (343, 63519), (651, 33467), (683, 31899), (1029, 21173), (1519, 14343), (2049, 10633), (4557, 4781)]