20924225

素因数分解:

$5^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:103

約数の個数: 72

約数和(自身を含む): 33926400

約数和(自身を除く): 13002175

約数列:

[1, 5, 7, 19, 25, 29, 31, 35, 49, 95, 133, 145, 155, 175, 203, 217, 245, 475, 551, 589, 665, 725, 775, 899, 931, 1015, 1085, 1225, 1421, 1519, 2755, 2945, 3325, 3857, 4123, 4495, 4655, 5075, 5425, 6293, 7105, 7595, 13775, 14725, 17081, 19285, 20615, 22475, 23275, 26999, 28861, 31465, 35525, 37975, 44051, 85405, 96425, 103075, 119567, 134995, 144305, 157325, 220255, 427025, 597835, 674975, 721525, 836969, 1101275, 2989175, 4184845, 20924225]

約数ペア:

[(1, 20924225), (5, 4184845), (7, 2989175), (19, 1101275), (25, 836969), (29, 721525), (31, 674975), (35, 597835), (49, 427025), (95, 220255), (133, 157325), (145, 144305), (155, 134995), (175, 119567), (203, 103075), (217, 96425), (245, 85405), (475, 44051), (551, 37975), (589, 35525), (665, 31465), (725, 28861), (775, 26999), (899, 23275), (931, 22475), (1015, 20615), (1085, 19285), (1225, 17081), (1421, 14725), (1519, 13775), (2755, 7595), (2945, 7105), (3325, 6293), (3857, 5425), (4123, 5075), (4495, 4655)]