21499863

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{571}}^1$

素因数の和:755

約数の個数: 32

約数和(自身を含む): 36022272

約数和(自身を除く): 14522409

約数列:

[1, 3, 7, 11, 21, 33, 77, 163, 231, 489, 571, 1141, 1713, 1793, 3423, 3997, 5379, 6281, 11991, 12551, 18843, 37653, 43967, 93073, 131901, 279219, 651511, 1023803, 1954533, 3071409, 7166621, 21499863]

約数ペア:

[(1, 21499863), (3, 7166621), (7, 3071409), (11, 1954533), (21, 1023803), (33, 651511), (77, 279219), (163, 131901), (231, 93073), (489, 43967), (571, 37653), (1141, 18843), (1713, 12551), (1793, 11991), (3423, 6281), (3997, 5379)]