20379710

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{389}}^1$

素因数の和:453

約数の個数: 48

約数和(自身を含む): 41109120

約数和(自身を除く): 20729410

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 169, 310, 338, 389, 403, 778, 806, 845, 1690, 1945, 2015, 3890, 4030, 5057, 5239, 10114, 10478, 12059, 24118, 25285, 26195, 50570, 52390, 60295, 65741, 120590, 131482, 156767, 313534, 328705, 657410, 783835, 1567670, 2037971, 4075942, 10189855, 20379710]

約数ペア:

[(1, 20379710), (2, 10189855), (5, 4075942), (10, 2037971), (13, 1567670), (26, 783835), (31, 657410), (62, 328705), (65, 313534), (130, 156767), (155, 131482), (169, 120590), (310, 65741), (338, 60295), (389, 52390), (403, 50570), (778, 26195), (806, 25285), (845, 24118), (1690, 12059), (1945, 10478), (2015, 10114), (3890, 5239), (4030, 5057)]