18858125

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1$

素因数の和:255

約数の個数: 40

約数和(自身を含む): 27816096

約数和(自身を除く): 8957971

約数列:

[1, 5, 11, 13, 25, 55, 65, 125, 143, 211, 275, 325, 625, 715, 1055, 1375, 1625, 2321, 2743, 3575, 5275, 6875, 8125, 11605, 13715, 17875, 26375, 30173, 58025, 68575, 89375, 131875, 150865, 290125, 342875, 754325, 1450625, 1714375, 3771625, 18858125]

約数ペア:

[(1, 18858125), (5, 3771625), (11, 1714375), (13, 1450625), (25, 754325), (55, 342875), (65, 290125), (125, 150865), (143, 131875), (211, 89375), (275, 68575), (325, 58025), (625, 30173), (715, 26375), (1055, 17875), (1375, 13715), (1625, 11605), (2321, 8125), (2743, 6875), (3575, 5275)]