19911790.000000000

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{412123}}^1$

素因数の和:412140

約数の個数: 36

約数和(自身を含む): 300026272

約数和(自身を除く): 196171276

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 252, 412123, 824246, 1236369, 1648492, 2472738, 2884861, 3709107, 4945476, 5769722, 7418214, 8654583, 11539444, 14836428, 17309166, 25963749, 34618332, 51927498, 103854996]

約数ペア:

[(1, 103854996), (2, 51927498), (3, 34618332), (4, 25963749), (6, 17309166), (7, 14836428), (9, 11539444), (12, 8654583), (14, 7418214), (18, 5769722), (21, 4945476), (28, 3709107), (36, 2884861), (42, 2472738), (63, 1648492), (84, 1236369), (126, 824246), (252, 412123)]