81131985

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{251}}^1\times {\mathrm{653}}^1$

素因数の和:926

約数の個数: 48

約数和(自身を含む): 154260288

約数和(自身を除く): 73128303

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 251, 495, 653, 753, 1255, 1959, 2259, 2761, 3265, 3765, 5877, 7183, 8283, 9795, 11295, 13805, 21549, 24849, 29385, 35915, 41415, 64647, 107745, 124245, 163903, 323235, 491709, 819515, 1475127, 1802933, 2458545, 5408799, 7375635, 9014665, 16226397, 27043995, 81131985]

約数ペア:

[(1, 81131985), (3, 27043995), (5, 16226397), (9, 9014665), (11, 7375635), (15, 5408799), (33, 2458545), (45, 1802933), (55, 1475127), (99, 819515), (165, 491709), (251, 323235), (495, 163903), (653, 124245), (753, 107745), (1255, 64647), (1959, 41415), (2259, 35915), (2761, 29385), (3265, 24849), (3765, 21549), (5877, 13805), (7183, 11295), (8283, 9795)]