81117440

素因数分解:

$2^8\times 5^1\times {\mathrm{127}}^1\times {\mathrm{499}}^1$

素因数の和:647

約数の個数: 72

約数和(自身を含む): 196224000

約数和(自身を除く): 115106560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 256, 320, 499, 508, 635, 640, 998, 1016, 1270, 1280, 1996, 2032, 2495, 2540, 3992, 4064, 4990, 5080, 7984, 8128, 9980, 10160, 15968, 16256, 19960, 20320, 31936, 32512, 39920, 40640, 63373, 63872, 79840, 81280, 126746, 127744, 159680, 162560, 253492, 316865, 319360, 506984, 633730, 638720, 1013968, 1267460, 2027936, 2534920, 4055872, 5069840, 8111744, 10139680, 16223488, 20279360, 40558720, 81117440]

約数ペア:

[(1, 81117440), (2, 40558720), (4, 20279360), (5, 16223488), (8, 10139680), (10, 8111744), (16, 5069840), (20, 4055872), (32, 2534920), (40, 2027936), (64, 1267460), (80, 1013968), (127, 638720), (128, 633730), (160, 506984), (254, 319360), (256, 316865), (320, 253492), (499, 162560), (508, 159680), (635, 127744), (640, 126746), (998, 81280), (1016, 79840), (1270, 63872), (1280, 63373), (1996, 40640), (2032, 39920), (2495, 32512), (2540, 31936), (3992, 20320), (4064, 19960), (4990, 16256), (5080, 15968), (7984, 10160), (8128, 9980)]