28721440

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{16319}}^1$

素因数の和:16345

約数の個数: 48

約数和(自身を含む): 74027520

約数和(自身を除く): 45306080

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 16319, 32638, 65276, 81595, 130552, 163190, 179509, 261104, 326380, 359018, 522208, 652760, 718036, 897545, 1305520, 1436072, 1795090, 2611040, 2872144, 3590180, 5744288, 7180360, 14360720, 28721440]

約数ペア:

[(1, 28721440), (2, 14360720), (4, 7180360), (5, 5744288), (8, 3590180), (10, 2872144), (11, 2611040), (16, 1795090), (20, 1436072), (22, 1305520), (32, 897545), (40, 718036), (44, 652760), (55, 522208), (80, 359018), (88, 326380), (110, 261104), (160, 179509), (176, 163190), (220, 130552), (352, 81595), (440, 65276), (880, 32638), (1760, 16319)]