81488120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4099}}^1$

素因数の和:4188

約数の個数: 64

約数和(自身を含む): 212544000

約数和(自身を除く): 131055880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1420, 1988, 2485, 2840, 3976, 4099, 4970, 8198, 9940, 16396, 19880, 20495, 28693, 32792, 40990, 57386, 81980, 114772, 143465, 163960, 229544, 286930, 291029, 573860, 582058, 1147720, 1164116, 1455145, 2037203, 2328232, 2910290, 4074406, 5820580, 8148812, 10186015, 11641160, 16297624, 20372030, 40744060, 81488120]

約数ペア:

[(1, 81488120), (2, 40744060), (4, 20372030), (5, 16297624), (7, 11641160), (8, 10186015), (10, 8148812), (14, 5820580), (20, 4074406), (28, 2910290), (35, 2328232), (40, 2037203), (56, 1455145), (70, 1164116), (71, 1147720), (140, 582058), (142, 573860), (280, 291029), (284, 286930), (355, 229544), (497, 163960), (568, 143465), (710, 114772), (994, 81980), (1420, 57386), (1988, 40990), (2485, 32792), (2840, 28693), (3976, 20495), (4099, 19880), (4970, 16396), (8198, 9940)]