20386660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{653}}^1$

素因数の和:892

約数の個数: 48

約数和(自身を含む): 49222656

約数和(自身を除く): 28835996

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 223, 446, 653, 892, 1115, 1306, 1561, 2230, 2612, 3122, 3265, 4460, 4571, 6244, 6530, 7805, 9142, 13060, 15610, 18284, 22855, 31220, 45710, 91420, 145619, 291238, 582476, 728095, 1019333, 1456190, 2038666, 2912380, 4077332, 5096665, 10193330, 20386660]

約数ペア:

[(1, 20386660), (2, 10193330), (4, 5096665), (5, 4077332), (7, 2912380), (10, 2038666), (14, 1456190), (20, 1019333), (28, 728095), (35, 582476), (70, 291238), (140, 145619), (223, 91420), (446, 45710), (653, 31220), (892, 22855), (1115, 18284), (1306, 15610), (1561, 13060), (2230, 9142), (2612, 7805), (3122, 6530), (3265, 6244), (4460, 4571)]