208807617

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1\times {\mathrm{257}}^1$

素因数の和:545

約数の個数: 32

約数和(自身を含む): 300931200

約数和(自身を除く): 92123583

約数列:

[1, 3, 17, 51, 89, 179, 257, 267, 537, 771, 1513, 3043, 4369, 4539, 9129, 13107, 15931, 22873, 46003, 47793, 68619, 138009, 270827, 388841, 782051, 812481, 1166523, 2346153, 4094267, 12282801, 69602539, 208807617]

約数ペア:

[(1, 208807617), (3, 69602539), (17, 12282801), (51, 4094267), (89, 2346153), (179, 1166523), (257, 812481), (267, 782051), (537, 388841), (771, 270827), (1513, 138009), (3043, 68619), (4369, 47793), (4539, 46003), (9129, 22873), (13107, 15931)]