18933860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{967}}^1$

素因数の和:1076

約数の個数: 48

約数和(自身を含む): 43908480

約数和(自身を除く): 24974620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 967, 979, 1780, 1934, 1958, 3868, 3916, 4835, 4895, 9670, 9790, 10637, 19340, 19580, 21274, 42548, 53185, 86063, 106370, 172126, 212740, 344252, 430315, 860630, 946693, 1721260, 1893386, 3786772, 4733465, 9466930, 18933860]

約数ペア:

[(1, 18933860), (2, 9466930), (4, 4733465), (5, 3786772), (10, 1893386), (11, 1721260), (20, 946693), (22, 860630), (44, 430315), (55, 344252), (89, 212740), (110, 172126), (178, 106370), (220, 86063), (356, 53185), (445, 42548), (890, 21274), (967, 19580), (979, 19340), (1780, 10637), (1934, 9790), (1958, 9670), (3868, 4895), (3916, 4835)]