21979180

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{8389}}^1$

素因数の和:8529

約数の個数: 24

約数和(自身を含む): 46514160

約数和(自身を除く): 24534980

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 8389, 16778, 33556, 41945, 83890, 167780, 1098959, 2197918, 4395836, 5494795, 10989590, 21979180]

約数ペア:

[(1, 21979180), (2, 10989590), (4, 5494795), (5, 4395836), (10, 2197918), (20, 1098959), (131, 167780), (262, 83890), (524, 41945), (655, 33556), (1310, 16778), (2620, 8389)]