21000273872

素因数分解:

$2^4\times {\mathrm{18617}}^1\times {\mathrm{70501}}^1$

素因数の和:89126

約数の個数: 20

約数和(自身を含む): 40690793316

約数和(自身を除く): 19690519444

約数列:

[1, 2, 4, 8, 16, 18617, 37234, 70501, 74468, 141002, 148936, 282004, 297872, 564008, 1128016, 1312517117, 2625034234, 5250068468, 10500136936, 21000273872]

約数ペア:

[(1, 21000273872), (2, 10500136936), (4, 5250068468), (8, 2625034234), (16, 1312517117), (18617, 1128016), (37234, 564008), (70501, 297872), (74468, 282004), (141002, 148936)]