21020238710

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{173}}^1\times {\mathrm{42043}}^1$

素因数の和:42257

約数の個数: 48

約数和(自身を含む): 40426315056

約数和(自身を除く): 19406076346

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 173, 289, 346, 578, 865, 1445, 1730, 2890, 2941, 5882, 14705, 29410, 42043, 49997, 84086, 99994, 210215, 249985, 420430, 499970, 714731, 1429462, 3573655, 7147310, 7273439, 12150427, 14546878, 24300854, 36367195, 60752135, 72734390, 121504270, 123648463, 247296926, 618242315, 1236484630, 2102023871, 4204047742, 10510119355, 21020238710]

約数ペア:

[(1, 21020238710), (2, 10510119355), (5, 4204047742), (10, 2102023871), (17, 1236484630), (34, 618242315), (85, 247296926), (170, 123648463), (173, 121504270), (289, 72734390), (346, 60752135), (578, 36367195), (865, 24300854), (1445, 14546878), (1730, 12150427), (2890, 7273439), (2941, 7147310), (5882, 3573655), (14705, 1429462), (29410, 714731), (42043, 499970), (49997, 420430), (84086, 249985), (99994, 210215)]