19540225

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1999}}^1$

素因数の和:2049

約数の個数: 24

約数和(自身を含む): 26784000

約数和(自身を除く): 7243775

約数列:

[1, 5, 17, 23, 25, 85, 115, 391, 425, 575, 1955, 1999, 9775, 9995, 33983, 45977, 49975, 169915, 229885, 781609, 849575, 1149425, 3908045, 19540225]

約数ペア:

[(1, 19540225), (5, 3908045), (17, 1149425), (23, 849575), (25, 781609), (85, 229885), (115, 169915), (391, 49975), (425, 45977), (575, 33983), (1955, 9995), (1999, 9775)]