20609420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2557}}^1$

素因数の和:2610

約数の個数: 48

約数和(自身を含む): 48131328

約数和(自身を除く): 27521908

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 2557, 4030, 5114, 8060, 10228, 12785, 25570, 33241, 51140, 66482, 79267, 132964, 158534, 166205, 317068, 332410, 396335, 664820, 792670, 1030471, 1585340, 2060942, 4121884, 5152355, 10304710, 20609420]

約数ペア:

[(1, 20609420), (2, 10304710), (4, 5152355), (5, 4121884), (10, 2060942), (13, 1585340), (20, 1030471), (26, 792670), (31, 664820), (52, 396335), (62, 332410), (65, 317068), (124, 166205), (130, 158534), (155, 132964), (260, 79267), (310, 66482), (403, 51140), (620, 33241), (806, 25570), (1612, 12785), (2015, 10228), (2557, 8060), (4030, 5114)]