638012240

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{257263}}^1$

素因数の和:257307

約数の個数: 40

約数和(自身を含む): 1531235328

約数和(自身を除く): 893223088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 257263, 514526, 1029052, 1286315, 2058104, 2572630, 4116208, 5145260, 7975153, 10290520, 15950306, 20581040, 31900612, 39875765, 63801224, 79751530, 127602448, 159503060, 319006120, 638012240]

約数ペア:

[(1, 638012240), (2, 319006120), (4, 159503060), (5, 127602448), (8, 79751530), (10, 63801224), (16, 39875765), (20, 31900612), (31, 20581040), (40, 15950306), (62, 10290520), (80, 7975153), (124, 5145260), (155, 4116208), (248, 2572630), (310, 2058104), (496, 1286315), (620, 1029052), (1240, 514526), (2480, 257263)]