21829798520

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{199}}^1\times {\mathrm{13921}}^1$

素因数の和:14328

約数の個数: 64

約数和(自身を含む): 49618008000

約数和(自身を除く): 27788209480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 199, 394, 398, 788, 796, 985, 995, 1576, 1592, 1970, 1990, 3940, 3980, 7880, 7960, 13921, 27842, 39203, 55684, 69605, 78406, 111368, 139210, 156812, 196015, 278420, 313624, 392030, 556840, 784060, 1568120, 2742437, 2770279, 5484874, 5540558, 10969748, 11081116, 13712185, 13851395, 21939496, 22162232, 27424370, 27702790, 54848740, 55405580, 109697480, 110811160, 545744963, 1091489926, 2182979852, 2728724815, 4365959704, 5457449630, 10914899260, 21829798520]

約数ペア:

[(1, 21829798520), (2, 10914899260), (4, 5457449630), (5, 4365959704), (8, 2728724815), (10, 2182979852), (20, 1091489926), (40, 545744963), (197, 110811160), (199, 109697480), (394, 55405580), (398, 54848740), (788, 27702790), (796, 27424370), (985, 22162232), (995, 21939496), (1576, 13851395), (1592, 13712185), (1970, 11081116), (1990, 10969748), (3940, 5540558), (3980, 5484874), (7880, 2770279), (7960, 2742437), (13921, 1568120), (27842, 784060), (39203, 556840), (55684, 392030), (69605, 313624), (78406, 278420), (111368, 196015), (139210, 156812)]