20856940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{827}}^1$

素因数の和:946

約数の個数: 48

約数和(自身を含む): 47712672

約数和(自身を除く): 26855732

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 97, 130, 194, 260, 388, 485, 827, 970, 1261, 1654, 1940, 2522, 3308, 4135, 5044, 6305, 8270, 10751, 12610, 16540, 21502, 25220, 43004, 53755, 80219, 107510, 160438, 215020, 320876, 401095, 802190, 1042847, 1604380, 2085694, 4171388, 5214235, 10428470, 20856940]

約数ペア:

[(1, 20856940), (2, 10428470), (4, 5214235), (5, 4171388), (10, 2085694), (13, 1604380), (20, 1042847), (26, 802190), (52, 401095), (65, 320876), (97, 215020), (130, 160438), (194, 107510), (260, 80219), (388, 53755), (485, 43004), (827, 25220), (970, 21502), (1261, 16540), (1654, 12610), (1940, 10751), (2522, 8270), (3308, 6305), (4135, 5044)]