6561891

素因数分解:

$3^4\times 7^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:253

約数の個数: 40

約数和(自身を含む): 11430144

約数和(自身を除く): 4868253

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 81, 163, 189, 213, 489, 497, 567, 639, 1141, 1467, 1491, 1917, 3423, 4401, 4473, 5751, 10269, 11573, 13203, 13419, 30807, 34719, 40257, 81011, 92421, 104157, 243033, 312471, 729099, 937413, 2187297, 6561891]

約数ペア:

[(1, 6561891), (3, 2187297), (7, 937413), (9, 729099), (21, 312471), (27, 243033), (63, 104157), (71, 92421), (81, 81011), (163, 40257), (189, 34719), (213, 30807), (489, 13419), (497, 13203), (567, 11573), (639, 10269), (1141, 5751), (1467, 4473), (1491, 4401), (1917, 3423)]