21000837808

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{227}}^1\times {\mathrm{81439}}^1$

素因数の和:81745

約数の個数: 40

約数和(自身を含む): 41444490240

約数和(自身を除く): 20443652432

約数列:

[1, 2, 4, 8, 16, 71, 142, 227, 284, 454, 568, 908, 1136, 1816, 3632, 16117, 32234, 64468, 81439, 128936, 162878, 257872, 325756, 651512, 1303024, 5782169, 11564338, 18486653, 23128676, 36973306, 46257352, 73946612, 92514704, 147893224, 295786448, 1312552363, 2625104726, 5250209452, 10500418904, 21000837808]

約数ペア:

[(1, 21000837808), (2, 10500418904), (4, 5250209452), (8, 2625104726), (16, 1312552363), (71, 295786448), (142, 147893224), (227, 92514704), (284, 73946612), (454, 46257352), (568, 36973306), (908, 23128676), (1136, 18486653), (1816, 11564338), (3632, 5782169), (16117, 1303024), (32234, 651512), (64468, 325756), (81439, 257872), (128936, 162878)]