81297920

素因数分解:

$2^9\times 5^1\times {\mathrm{11}}^1\times {\mathrm{2887}}^1$

素因数の和:2921

約数の個数: 80

約数和(自身を含む): 212718528

約数和(自身を除く): 131420608

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 512, 640, 704, 880, 1280, 1408, 1760, 2560, 2816, 2887, 3520, 5632, 5774, 7040, 11548, 14080, 14435, 23096, 28160, 28870, 31757, 46192, 57740, 63514, 92384, 115480, 127028, 158785, 184768, 230960, 254056, 317570, 369536, 461920, 508112, 635140, 739072, 923840, 1016224, 1270280, 1478144, 1847680, 2032448, 2540560, 3695360, 4064896, 5081120, 7390720, 8129792, 10162240, 16259584, 20324480, 40648960, 81297920]

約数ペア:

[(1, 81297920), (2, 40648960), (4, 20324480), (5, 16259584), (8, 10162240), (10, 8129792), (11, 7390720), (16, 5081120), (20, 4064896), (22, 3695360), (32, 2540560), (40, 2032448), (44, 1847680), (55, 1478144), (64, 1270280), (80, 1016224), (88, 923840), (110, 739072), (128, 635140), (160, 508112), (176, 461920), (220, 369536), (256, 317570), (320, 254056), (352, 230960), (440, 184768), (512, 158785), (640, 127028), (704, 115480), (880, 92384), (1280, 63514), (1408, 57740), (1760, 46192), (2560, 31757), (2816, 28870), (2887, 28160), (3520, 23096), (5632, 14435), (5774, 14080), (7040, 11548)]