17782821

素因数分解:

$3^4\times 7^1\times {\mathrm{79}}^1\times {\mathrm{397}}^1$

素因数の和:495

約数の個数: 40

約数和(自身を含む): 30821120

約数和(自身を除く): 13038299

約数列:

[1, 3, 7, 9, 21, 27, 63, 79, 81, 189, 237, 397, 553, 567, 711, 1191, 1659, 2133, 2779, 3573, 4977, 6399, 8337, 10719, 14931, 25011, 31363, 32157, 44793, 75033, 94089, 219541, 225099, 282267, 658623, 846801, 1975869, 2540403, 5927607, 17782821]

約数ペア:

[(1, 17782821), (3, 5927607), (7, 2540403), (9, 1975869), (21, 846801), (27, 658623), (63, 282267), (79, 225099), (81, 219541), (189, 94089), (237, 75033), (397, 44793), (553, 32157), (567, 31363), (711, 25011), (1191, 14931), (1659, 10719), (2133, 8337), (2779, 6399), (3573, 4977)]