81421221

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1\times {\mathrm{691}}^1$

素因数の和:913

約数の個数: 32

約数和(自身を含む): 128966656

約数和(自身を除く): 47545435

約数列:

[1, 3, 7, 21, 31, 93, 181, 217, 543, 651, 691, 1267, 2073, 3801, 4837, 5611, 14511, 16833, 21421, 39277, 64263, 117831, 125071, 149947, 375213, 449841, 875497, 2626491, 3877201, 11631603, 27140407, 81421221]

約数ペア:

[(1, 81421221), (3, 27140407), (7, 11631603), (21, 3877201), (31, 2626491), (93, 875497), (181, 449841), (217, 375213), (543, 149947), (651, 125071), (691, 117831), (1267, 64263), (2073, 39277), (3801, 21421), (4837, 16833), (5611, 14511)]