21188175

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 37283328

約数和(自身を除く): 16095153

約数列:

[1, 3, 5, 15, 23, 25, 69, 71, 75, 115, 173, 213, 345, 355, 519, 575, 865, 1065, 1633, 1725, 1775, 2595, 3979, 4325, 4899, 5325, 8165, 11937, 12283, 12975, 19895, 24495, 36849, 40825, 59685, 61415, 99475, 122475, 184245, 282509, 298425, 307075, 847527, 921225, 1412545, 4237635, 7062725, 21188175]

約数ペア:

[(1, 21188175), (3, 7062725), (5, 4237635), (15, 1412545), (23, 921225), (25, 847527), (69, 307075), (71, 298425), (75, 282509), (115, 184245), (173, 122475), (213, 99475), (345, 61415), (355, 59685), (519, 40825), (575, 36849), (865, 24495), (1065, 19895), (1633, 12975), (1725, 12283), (1775, 11937), (2595, 8165), (3979, 5325), (4325, 4899)]