20649573

素因数分解:

$3^4\times 7^1\times {\mathrm{79}}^1\times {\mathrm{461}}^1$

素因数の和:559

約数の個数: 40

約数和(自身を含む): 35777280

約数和(自身を除く): 15127707

約数列:

[1, 3, 7, 9, 21, 27, 63, 79, 81, 189, 237, 461, 553, 567, 711, 1383, 1659, 2133, 3227, 4149, 4977, 6399, 9681, 12447, 14931, 29043, 36419, 37341, 44793, 87129, 109257, 254933, 261387, 327771, 764799, 983313, 2294397, 2949939, 6883191, 20649573]

約数ペア:

[(1, 20649573), (3, 6883191), (7, 2949939), (9, 2294397), (21, 983313), (27, 764799), (63, 327771), (79, 261387), (81, 254933), (189, 109257), (237, 87129), (461, 44793), (553, 37341), (567, 36419), (711, 29043), (1383, 14931), (1659, 12447), (2133, 9681), (3227, 6399), (4149, 4977)]