18920223

素因数分解:

$3^5\times 7^3\times {\mathrm{227}}^1$

素因数の和:263

約数の個数: 48

約数和(自身を含む): 33196800

約数和(自身を除く): 14276577

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 227, 243, 343, 441, 567, 681, 1029, 1323, 1589, 1701, 2043, 3087, 3969, 4767, 6129, 9261, 11123, 11907, 14301, 18387, 27783, 33369, 42903, 55161, 77861, 83349, 100107, 128709, 233583, 300321, 386127, 700749, 900963, 2102247, 2702889, 6306741, 18920223]

約数ペア:

[(1, 18920223), (3, 6306741), (7, 2702889), (9, 2102247), (21, 900963), (27, 700749), (49, 386127), (63, 300321), (81, 233583), (147, 128709), (189, 100107), (227, 83349), (243, 77861), (343, 55161), (441, 42903), (567, 33369), (681, 27783), (1029, 18387), (1323, 14301), (1589, 11907), (1701, 11123), (2043, 9261), (3087, 6129), (3969, 4767)]