28911393

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 49953280

約数和(自身を除く): 21041887

約数列:

[1, 3, 7, 9, 21, 37, 63, 79, 111, 157, 237, 259, 333, 471, 553, 711, 777, 1099, 1413, 1659, 2331, 2923, 3297, 4977, 5809, 8769, 9891, 12403, 17427, 20461, 26307, 37209, 40663, 52281, 61383, 86821, 111627, 121989, 184149, 260463, 365967, 458911, 781389, 1376733, 3212377, 4130199, 9637131, 28911393]

約数ペア:

[(1, 28911393), (3, 9637131), (7, 4130199), (9, 3212377), (21, 1376733), (37, 781389), (63, 458911), (79, 365967), (111, 260463), (157, 184149), (237, 121989), (259, 111627), (333, 86821), (471, 61383), (553, 52281), (711, 40663), (777, 37209), (1099, 26307), (1413, 20461), (1659, 17427), (2331, 12403), (2923, 9891), (3297, 8769), (4977, 5809)]