81531828

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{251}}^1\times {\mathrm{1289}}^1$

素因数の和:1557

約数の個数: 72

約数和(自身を含む): 236658240

約数和(自身を除く): 155126412

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 251, 252, 502, 753, 1004, 1289, 1506, 1757, 2259, 2578, 3012, 3514, 3867, 4518, 5156, 5271, 7028, 7734, 9023, 9036, 10542, 11601, 15468, 15813, 18046, 21084, 23202, 27069, 31626, 36092, 46404, 54138, 63252, 81207, 108276, 162414, 323539, 324828, 647078, 970617, 1294156, 1941234, 2264773, 2911851, 3882468, 4529546, 5823702, 6794319, 9059092, 11647404, 13588638, 20382957, 27177276, 40765914, 81531828]

約数ペア:

[(1, 81531828), (2, 40765914), (3, 27177276), (4, 20382957), (6, 13588638), (7, 11647404), (9, 9059092), (12, 6794319), (14, 5823702), (18, 4529546), (21, 3882468), (28, 2911851), (36, 2264773), (42, 1941234), (63, 1294156), (84, 970617), (126, 647078), (251, 324828), (252, 323539), (502, 162414), (753, 108276), (1004, 81207), (1289, 63252), (1506, 54138), (1757, 46404), (2259, 36092), (2578, 31626), (3012, 27069), (3514, 23202), (3867, 21084), (4518, 18046), (5156, 15813), (5271, 15468), (7028, 11601), (7734, 10542), (9023, 9036)]