640535787

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{173}}^1\times {\mathrm{8753}}^1$

素因数の和:8979

約数の個数: 24

約数和(自身を含む): 950474304

約数和(自身を除く): 309938517

約数列:

[1, 3, 9, 47, 141, 173, 423, 519, 1557, 8131, 8753, 24393, 26259, 73179, 78777, 411391, 1234173, 1514269, 3702519, 4542807, 13628421, 71170643, 213511929, 640535787]

約数ペア:

[(1, 640535787), (3, 213511929), (9, 71170643), (47, 13628421), (141, 4542807), (173, 3702519), (423, 1514269), (519, 1234173), (1557, 411391), (8131, 78777), (8753, 73179), (24393, 26259)]