18071781

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1249}}^1$

素因数の和:1325

約数の個数: 32

約数和(自身を含む): 30240000

約数和(自身を除く): 12168219

約数列:

[1, 3, 7, 13, 21, 39, 53, 91, 159, 273, 371, 689, 1113, 1249, 2067, 3747, 4823, 8743, 14469, 16237, 26229, 48711, 66197, 113659, 198591, 340977, 463379, 860561, 1390137, 2581683, 6023927, 18071781]

約数ペア:

[(1, 18071781), (3, 6023927), (7, 2581683), (13, 1390137), (21, 860561), (39, 463379), (53, 340977), (91, 198591), (159, 113659), (273, 66197), (371, 48711), (689, 26229), (1113, 16237), (1249, 14469), (2067, 8743), (3747, 4823)]