21890260

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{3191}}^1$

素因数の和:3221

約数の個数: 48

約数和(自身を含む): 53625600

約数和(自身を除く): 31735340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 3191, 3430, 6382, 6860, 12764, 15955, 22337, 31910, 44674, 63820, 89348, 111685, 156359, 223370, 312718, 446740, 625436, 781795, 1094513, 1563590, 2189026, 3127180, 4378052, 5472565, 10945130, 21890260]

約数ペア:

[(1, 21890260), (2, 10945130), (4, 5472565), (5, 4378052), (7, 3127180), (10, 2189026), (14, 1563590), (20, 1094513), (28, 781795), (35, 625436), (49, 446740), (70, 312718), (98, 223370), (140, 156359), (196, 111685), (245, 89348), (343, 63820), (490, 44674), (686, 31910), (980, 22337), (1372, 15955), (1715, 12764), (3191, 6860), (3430, 6382)]