20791940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{379}}^1$

素因数の和:612

約数の個数: 48

約数和(自身を含む): 47369280

約数和(自身を除く): 26577340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 211, 260, 379, 422, 758, 844, 1055, 1516, 1895, 2110, 2743, 3790, 4220, 4927, 5486, 7580, 9854, 10972, 13715, 19708, 24635, 27430, 49270, 54860, 79969, 98540, 159938, 319876, 399845, 799690, 1039597, 1599380, 2079194, 4158388, 5197985, 10395970, 20791940]

約数ペア:

[(1, 20791940), (2, 10395970), (4, 5197985), (5, 4158388), (10, 2079194), (13, 1599380), (20, 1039597), (26, 799690), (52, 399845), (65, 319876), (130, 159938), (211, 98540), (260, 79969), (379, 54860), (422, 49270), (758, 27430), (844, 24635), (1055, 19708), (1516, 13715), (1895, 10972), (2110, 9854), (2743, 7580), (3790, 5486), (4220, 4927)]