20745280

素因数分解:

$2^6\times 5^1\times {\mathrm{241}}^1\times {\mathrm{269}}^1$

素因数の和:527

約数の個数: 56

約数和(自身を含む): 49789080

約数和(自身を除く): 29043800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 241, 269, 320, 482, 538, 964, 1076, 1205, 1345, 1928, 2152, 2410, 2690, 3856, 4304, 4820, 5380, 7712, 8608, 9640, 10760, 15424, 17216, 19280, 21520, 38560, 43040, 64829, 77120, 86080, 129658, 259316, 324145, 518632, 648290, 1037264, 1296580, 2074528, 2593160, 4149056, 5186320, 10372640, 20745280]

約数ペア:

[(1, 20745280), (2, 10372640), (4, 5186320), (5, 4149056), (8, 2593160), (10, 2074528), (16, 1296580), (20, 1037264), (32, 648290), (40, 518632), (64, 324145), (80, 259316), (160, 129658), (241, 86080), (269, 77120), (320, 64829), (482, 43040), (538, 38560), (964, 21520), (1076, 19280), (1205, 17216), (1345, 15424), (1928, 10760), (2152, 9640), (2410, 8608), (2690, 7712), (3856, 5380), (4304, 4820)]