20469280

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^2\times {\mathrm{757}}^1$

素因数の和:798

約数の個数: 72

約数和(自身を含む): 52433892

約数和(自身を除く): 31964612

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 169, 208, 260, 338, 416, 520, 676, 757, 845, 1040, 1352, 1514, 1690, 2080, 2704, 3028, 3380, 3785, 5408, 6056, 6760, 7570, 9841, 12112, 13520, 15140, 19682, 24224, 27040, 30280, 39364, 49205, 60560, 78728, 98410, 121120, 127933, 157456, 196820, 255866, 314912, 393640, 511732, 639665, 787280, 1023464, 1279330, 1574560, 2046928, 2558660, 4093856, 5117320, 10234640, 20469280]

約数ペア:

[(1, 20469280), (2, 10234640), (4, 5117320), (5, 4093856), (8, 2558660), (10, 2046928), (13, 1574560), (16, 1279330), (20, 1023464), (26, 787280), (32, 639665), (40, 511732), (52, 393640), (65, 314912), (80, 255866), (104, 196820), (130, 157456), (160, 127933), (169, 121120), (208, 98410), (260, 78728), (338, 60560), (416, 49205), (520, 39364), (676, 30280), (757, 27040), (845, 24224), (1040, 19682), (1352, 15140), (1514, 13520), (1690, 12112), (2080, 9841), (2704, 7570), (3028, 6760), (3380, 6056), (3785, 5408)]