20815868

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{3467}}^1$

素因数の和:3569

約数の個数: 24

約数和(自身を含む): 38841600

約数和(自身を除く): 18025732

約数列:

[1, 2, 4, 19, 38, 76, 79, 158, 316, 1501, 3002, 3467, 6004, 6934, 13868, 65873, 131746, 263492, 273893, 547786, 1095572, 5203967, 10407934, 20815868]

約数ペア:

[(1, 20815868), (2, 10407934), (4, 5203967), (19, 1095572), (38, 547786), (76, 273893), (79, 263492), (158, 131746), (316, 65873), (1501, 13868), (3002, 6934), (3467, 6004)]