20381403

素因数分解:

$3^1\times 7^3\times {\mathrm{29}}^1\times {\mathrm{683}}^1$

素因数の和:736

約数の個数: 32

約数和(自身を含む): 32832000

約数和(自身を除く): 12450597

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 343, 609, 683, 1029, 1421, 2049, 4263, 4781, 9947, 14343, 19807, 29841, 33467, 59421, 100401, 138649, 234269, 415947, 702807, 970543, 2911629, 6793801, 20381403]

約数ペア:

[(1, 20381403), (3, 6793801), (7, 2911629), (21, 970543), (29, 702807), (49, 415947), (87, 234269), (147, 138649), (203, 100401), (343, 59421), (609, 33467), (683, 29841), (1029, 19807), (1421, 14343), (2049, 9947), (4263, 4781)]