20987535

素因数分解:

$3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1$

素因数の和:375

約数の個数: 32

約数和(自身を含む): 34560000

約数和(自身を除く): 13572465

約数列:

[1, 3, 5, 15, 79, 89, 199, 237, 267, 395, 445, 597, 995, 1185, 1335, 2985, 7031, 15721, 17711, 21093, 35155, 47163, 53133, 78605, 88555, 105465, 235815, 265665, 1399169, 4197507, 6995845, 20987535]

約数ペア:

[(1, 20987535), (3, 6995845), (5, 4197507), (15, 1399169), (79, 265665), (89, 235815), (199, 105465), (237, 88555), (267, 78605), (395, 53133), (445, 47163), (597, 35155), (995, 21093), (1185, 17711), (1335, 15721), (2985, 7031)]