20498660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1609}}^1$

素因数の和:1645

約数の個数: 72

約数和(自身を含む): 53960760

約数和(自身を除く): 33462100

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1609, 1820, 2548, 3185, 3218, 6370, 6436, 8045, 11263, 12740, 16090, 20917, 22526, 32180, 41834, 45052, 56315, 78841, 83668, 104585, 112630, 146419, 157682, 209170, 225260, 292838, 315364, 394205, 418340, 585676, 732095, 788410, 1024933, 1464190, 1576820, 2049866, 2928380, 4099732, 5124665, 10249330, 20498660]

約数ペア:

[(1, 20498660), (2, 10249330), (4, 5124665), (5, 4099732), (7, 2928380), (10, 2049866), (13, 1576820), (14, 1464190), (20, 1024933), (26, 788410), (28, 732095), (35, 585676), (49, 418340), (52, 394205), (65, 315364), (70, 292838), (91, 225260), (98, 209170), (130, 157682), (140, 146419), (182, 112630), (196, 104585), (245, 83668), (260, 78841), (364, 56315), (455, 45052), (490, 41834), (637, 32180), (910, 22526), (980, 20917), (1274, 16090), (1609, 12740), (1820, 11263), (2548, 8045), (3185, 6436), (3218, 6370)]