128512840

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{1223}}^1$

素因数の和:1342

約数の個数: 64

約数和(自身を含む): 301397760

約数和(自身を除く): 172884920

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 71, 74, 142, 148, 185, 284, 296, 355, 370, 568, 710, 740, 1223, 1420, 1480, 2446, 2627, 2840, 4892, 5254, 6115, 9784, 10508, 12230, 13135, 21016, 24460, 26270, 45251, 48920, 52540, 86833, 90502, 105080, 173666, 181004, 226255, 347332, 362008, 434165, 452510, 694664, 868330, 905020, 1736660, 1810040, 3212821, 3473320, 6425642, 12851284, 16064105, 25702568, 32128210, 64256420, 128512840]

約数ペア:

[(1, 128512840), (2, 64256420), (4, 32128210), (5, 25702568), (8, 16064105), (10, 12851284), (20, 6425642), (37, 3473320), (40, 3212821), (71, 1810040), (74, 1736660), (142, 905020), (148, 868330), (185, 694664), (284, 452510), (296, 434165), (355, 362008), (370, 347332), (568, 226255), (710, 181004), (740, 173666), (1223, 105080), (1420, 90502), (1480, 86833), (2446, 52540), (2627, 48920), (2840, 45251), (4892, 26270), (5254, 24460), (6115, 21016), (9784, 13135), (10508, 12230)]