20647510180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^3\times {\mathrm{775639}}^1$

素因数の和:775681

約数の個数: 48

約数和(自身を含む): 47692552320

約数和(自身を除く): 27045042140

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 1331, 2420, 2662, 5324, 6655, 13310, 26620, 775639, 1551278, 3102556, 3878195, 7756390, 8532029, 15512780, 17064058, 34128116, 42660145, 85320290, 93852319, 170640580, 187704638, 375409276, 469261595, 938523190, 1032375509, 1877046380, 2064751018, 4129502036, 5161877545, 10323755090, 20647510180]

約数ペア:

[(1, 20647510180), (2, 10323755090), (4, 5161877545), (5, 4129502036), (10, 2064751018), (11, 1877046380), (20, 1032375509), (22, 938523190), (44, 469261595), (55, 375409276), (110, 187704638), (121, 170640580), (220, 93852319), (242, 85320290), (484, 42660145), (605, 34128116), (1210, 17064058), (1331, 15512780), (2420, 8532029), (2662, 7756390), (5324, 3878195), (6655, 3102556), (13310, 1551278), (26620, 775639)]