21261266

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{223}}^1$

素因数の和:450

約数の個数: 32

約数和(自身を含む): 36503040

約数和(自身を除く): 15241774

約数列:

[1, 2, 13, 19, 26, 38, 193, 223, 247, 386, 446, 494, 2509, 2899, 3667, 4237, 5018, 5798, 7334, 8474, 43039, 47671, 55081, 86078, 95342, 110162, 559507, 817741, 1119014, 1635482, 10630633, 21261266]

約数ペア:

[(1, 21261266), (2, 10630633), (13, 1635482), (19, 1119014), (26, 817741), (38, 559507), (193, 110162), (223, 95342), (247, 86078), (386, 55081), (446, 47671), (494, 43039), (2509, 8474), (2899, 7334), (3667, 5798), (4237, 5018)]