81680004

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{191}}^1\times {\mathrm{1697}}^1$

素因数の和:1905

約数の個数: 72

約数和(自身を含む): 237339648

約数和(自身を除く): 155659644

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 191, 252, 382, 573, 764, 1146, 1337, 1697, 1719, 2292, 2674, 3394, 3438, 4011, 5091, 5348, 6788, 6876, 8022, 10182, 11879, 12033, 15273, 16044, 20364, 23758, 24066, 30546, 35637, 47516, 48132, 61092, 71274, 106911, 142548, 213822, 324127, 427644, 648254, 972381, 1296508, 1944762, 2268889, 2917143, 3889524, 4537778, 5834286, 6806667, 9075556, 11668572, 13613334, 20420001, 27226668, 40840002, 81680004]

約数ペア:

[(1, 81680004), (2, 40840002), (3, 27226668), (4, 20420001), (6, 13613334), (7, 11668572), (9, 9075556), (12, 6806667), (14, 5834286), (18, 4537778), (21, 3889524), (28, 2917143), (36, 2268889), (42, 1944762), (63, 1296508), (84, 972381), (126, 648254), (191, 427644), (252, 324127), (382, 213822), (573, 142548), (764, 106911), (1146, 71274), (1337, 61092), (1697, 48132), (1719, 47516), (2292, 35637), (2674, 30546), (3394, 24066), (3438, 23758), (4011, 20364), (5091, 16044), (5348, 15273), (6788, 12033), (6876, 11879), (8022, 10182)]