21958475

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1$

素因数の和:117

約数の個数: 72

約数和(自身を含む): 36810144

約数和(自身を除く): 14851669

約数列:

[1, 5, 7, 11, 17, 25, 35, 55, 61, 77, 85, 119, 121, 175, 187, 275, 305, 385, 425, 427, 595, 605, 671, 847, 935, 1037, 1309, 1525, 1925, 2057, 2135, 2975, 3025, 3355, 4235, 4675, 4697, 5185, 6545, 7259, 7381, 10285, 10675, 11407, 14399, 16775, 21175, 23485, 25925, 32725, 36295, 36905, 51425, 51667, 57035, 71995, 79849, 117425, 125477, 181475, 184525, 258335, 285175, 359975, 399245, 627385, 878339, 1291675, 1996225, 3136925, 4391695, 21958475]

約数ペア:

[(1, 21958475), (5, 4391695), (7, 3136925), (11, 1996225), (17, 1291675), (25, 878339), (35, 627385), (55, 399245), (61, 359975), (77, 285175), (85, 258335), (119, 184525), (121, 181475), (175, 125477), (187, 117425), (275, 79849), (305, 71995), (385, 57035), (425, 51667), (427, 51425), (595, 36905), (605, 36295), (671, 32725), (847, 25925), (935, 23485), (1037, 21175), (1309, 16775), (1525, 14399), (1925, 11407), (2057, 10675), (2135, 10285), (2975, 7381), (3025, 7259), (3355, 6545), (4235, 5185), (4675, 4697)]