21686125

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1$

素因数の和:454

約数の個数: 32

約数和(自身を含む): 29802240

約数和(自身を除く): 8116115

約数列:

[1, 5, 19, 23, 25, 95, 115, 125, 397, 437, 475, 575, 1985, 2185, 2375, 2875, 7543, 9131, 9925, 10925, 37715, 45655, 49625, 54625, 173489, 188575, 228275, 867445, 942875, 1141375, 4337225, 21686125]

約数ペア:

[(1, 21686125), (5, 4337225), (19, 1141375), (23, 942875), (25, 867445), (95, 228275), (115, 188575), (125, 173489), (397, 54625), (437, 49625), (475, 45655), (575, 37715), (1985, 10925), (2185, 9925), (2375, 9131), (2875, 7543)]