20551875

素因数分解:

$3^1\times 5^4\times {\mathrm{97}}^1\times {\mathrm{113}}^1$

素因数の和:233

約数の個数: 40

約数和(自身を含む): 34901328

約数和(自身を除く): 14349453

約数列:

[1, 3, 5, 15, 25, 75, 97, 113, 125, 291, 339, 375, 485, 565, 625, 1455, 1695, 1875, 2425, 2825, 7275, 8475, 10961, 12125, 14125, 32883, 36375, 42375, 54805, 60625, 70625, 164415, 181875, 211875, 274025, 822075, 1370125, 4110375, 6850625, 20551875]

約数ペア:

[(1, 20551875), (3, 6850625), (5, 4110375), (15, 1370125), (25, 822075), (75, 274025), (97, 211875), (113, 181875), (125, 164415), (291, 70625), (339, 60625), (375, 54805), (485, 42375), (565, 36375), (625, 32883), (1455, 14125), (1695, 12125), (1875, 10961), (2425, 8475), (2825, 7275)]