20702020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{347}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 46186560

約数和(自身を除く): 25484540

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 157, 190, 314, 347, 380, 628, 694, 785, 1388, 1570, 1735, 2983, 3140, 3470, 5966, 6593, 6940, 11932, 13186, 14915, 26372, 29830, 32965, 54479, 59660, 65930, 108958, 131860, 217916, 272395, 544790, 1035101, 1089580, 2070202, 4140404, 5175505, 10351010, 20702020]

約数ペア:

[(1, 20702020), (2, 10351010), (4, 5175505), (5, 4140404), (10, 2070202), (19, 1089580), (20, 1035101), (38, 544790), (76, 272395), (95, 217916), (157, 131860), (190, 108958), (314, 65930), (347, 59660), (380, 54479), (628, 32965), (694, 29830), (785, 26372), (1388, 14915), (1570, 13186), (1735, 11932), (2983, 6940), (3140, 6593), (3470, 5966)]