21267225

素因数分解:

$3^3\times 5^2\times 7^2\times {\mathrm{643}}^1$

素因数の和:676

約数の個数: 72

約数和(自身を含む): 45517920

約数和(自身を除く): 24250695

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 27, 35, 45, 49, 63, 75, 105, 135, 147, 175, 189, 225, 245, 315, 441, 525, 643, 675, 735, 945, 1225, 1323, 1575, 1929, 2205, 3215, 3675, 4501, 4725, 5787, 6615, 9645, 11025, 13503, 16075, 17361, 22505, 28935, 31507, 33075, 40509, 48225, 67515, 86805, 94521, 112525, 121527, 144675, 157535, 202545, 283563, 337575, 434025, 472605, 607635, 787675, 850689, 1012725, 1417815, 2363025, 3038175, 4253445, 7089075, 21267225]

約数ペア:

[(1, 21267225), (3, 7089075), (5, 4253445), (7, 3038175), (9, 2363025), (15, 1417815), (21, 1012725), (25, 850689), (27, 787675), (35, 607635), (45, 472605), (49, 434025), (63, 337575), (75, 283563), (105, 202545), (135, 157535), (147, 144675), (175, 121527), (189, 112525), (225, 94521), (245, 86805), (315, 67515), (441, 48225), (525, 40509), (643, 33075), (675, 31507), (735, 28935), (945, 22505), (1225, 17361), (1323, 16075), (1575, 13503), (1929, 11025), (2205, 9645), (3215, 6615), (3675, 5787), (4501, 4725)]