21689875

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{173}}^1$

素因数の和:264

約数の個数: 32

約数和(自身を含む): 29315520

約数和(自身を除く): 7625645

約数列:

[1, 5, 17, 25, 59, 85, 125, 173, 295, 425, 865, 1003, 1475, 2125, 2941, 4325, 5015, 7375, 10207, 14705, 21625, 25075, 51035, 73525, 125375, 173519, 255175, 367625, 867595, 1275875, 4337975, 21689875]

約数ペア:

[(1, 21689875), (5, 4337975), (17, 1275875), (25, 867595), (59, 367625), (85, 255175), (125, 173519), (173, 125375), (295, 73525), (425, 51035), (865, 25075), (1003, 21625), (1475, 14705), (2125, 10207), (2941, 7375), (4325, 5015)]