18749725

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{281}}^1$

素因数の和:465

約数の個数: 24

約数和(自身を含む): 24862248

約数和(自身を除く): 6112523

約数列:

[1, 5, 17, 25, 85, 157, 281, 425, 785, 1405, 2669, 3925, 4777, 7025, 13345, 23885, 44117, 66725, 119425, 220585, 749989, 1102925, 3749945, 18749725]

約数ペア:

[(1, 18749725), (5, 3749945), (17, 1102925), (25, 749989), (85, 220585), (157, 119425), (281, 66725), (425, 44117), (785, 23885), (1405, 13345), (2669, 7025), (3925, 4777)]