21420609

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 33672960

約数和(自身を除く): 12252351

約数列:

[1, 3, 7, 21, 73, 89, 157, 219, 267, 471, 511, 623, 1099, 1533, 1869, 3297, 6497, 11461, 13973, 19491, 34383, 41919, 45479, 80227, 97811, 136437, 240681, 293433, 1020029, 3060087, 7140203, 21420609]

約数ペア:

[(1, 21420609), (3, 7140203), (7, 3060087), (21, 1020029), (73, 293433), (89, 240681), (157, 136437), (219, 97811), (267, 80227), (471, 45479), (511, 41919), (623, 34383), (1099, 19491), (1533, 13973), (1869, 11461), (3297, 6497)]