21138620

素因数分解:

$2^2\times 5^1\times {\mathrm{967}}^1\times {\mathrm{1093}}^1$

素因数の和:2069

約数の個数: 24

約数和(自身を含む): 44477664

約数和(自身を除く): 23339044

約数列:

[1, 2, 4, 5, 10, 20, 967, 1093, 1934, 2186, 3868, 4372, 4835, 5465, 9670, 10930, 19340, 21860, 1056931, 2113862, 4227724, 5284655, 10569310, 21138620]

約数ペア:

[(1, 21138620), (2, 10569310), (4, 5284655), (5, 4227724), (10, 2113862), (20, 1056931), (967, 21860), (1093, 19340), (1934, 10930), (2186, 9670), (3868, 5465), (4372, 4835)]