81017775

素因数分解:

$3^2\times 5^2\times {\mathrm{397}}^1\times {\mathrm{907}}^1$

素因数の和:1320

約数の個数: 36

約数和(自身を含む): 145637752

約数和(自身を除く): 64619977

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 397, 907, 1191, 1985, 2721, 3573, 4535, 5955, 8163, 9925, 13605, 17865, 22675, 29775, 40815, 68025, 89325, 204075, 360079, 1080237, 1800395, 3240711, 5401185, 9001975, 16203555, 27005925, 81017775]

約数ペア:

[(1, 81017775), (3, 27005925), (5, 16203555), (9, 9001975), (15, 5401185), (25, 3240711), (45, 1800395), (75, 1080237), (225, 360079), (397, 204075), (907, 89325), (1191, 68025), (1985, 40815), (2721, 29775), (3573, 22675), (4535, 17865), (5955, 13605), (8163, 9925)]