20088775

素因数分解:

$5^2\times 7^2\times {\mathrm{23}}^2\times {\mathrm{31}}^1$

素因数の和:101

約数の個数: 54

約数和(自身を含む): 31268832

約数和(自身を除く): 11180057

約数列:

[1, 5, 7, 23, 25, 31, 35, 49, 115, 155, 161, 175, 217, 245, 529, 575, 713, 775, 805, 1085, 1127, 1225, 1519, 2645, 3565, 3703, 4025, 4991, 5425, 5635, 7595, 13225, 16399, 17825, 18515, 24955, 25921, 28175, 34937, 37975, 81995, 92575, 114793, 124775, 129605, 174685, 409975, 573965, 648025, 803551, 873425, 2869825, 4017755, 20088775]

約数ペア:

[(1, 20088775), (5, 4017755), (7, 2869825), (23, 873425), (25, 803551), (31, 648025), (35, 573965), (49, 409975), (115, 174685), (155, 129605), (161, 124775), (175, 114793), (217, 92575), (245, 81995), (529, 37975), (575, 34937), (713, 28175), (775, 25921), (805, 24955), (1085, 18515), (1127, 17825), (1225, 16399), (1519, 13225), (2645, 7595), (3565, 5635), (3703, 5425), (4025, 4991)]