17971947

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 31549440

約数和(自身を除く): 13577493

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 79, 157, 161, 207, 237, 471, 483, 553, 711, 1099, 1413, 1449, 1659, 1817, 3297, 3611, 4977, 5451, 9891, 10833, 12403, 12719, 16353, 25277, 32499, 37209, 38157, 75831, 86821, 111627, 114471, 227493, 260463, 285269, 781389, 855807, 1996883, 2567421, 5990649, 17971947]

約数ペア:

[(1, 17971947), (3, 5990649), (7, 2567421), (9, 1996883), (21, 855807), (23, 781389), (63, 285269), (69, 260463), (79, 227493), (157, 114471), (161, 111627), (207, 86821), (237, 75831), (471, 38157), (483, 37209), (553, 32499), (711, 25277), (1099, 16353), (1413, 12719), (1449, 12403), (1659, 10833), (1817, 9891), (3297, 5451), (3611, 4977)]