90239980

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{7039}}^1$

素因数の和:7689

約数の個数: 24

約数和(自身を含む): 189826560

約数和(自身を除く): 99586580

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 2564, 3205, 6410, 7039, 12820, 14078, 28156, 35195, 70390, 140780, 4511999, 9023998, 18047996, 22559995, 45119990, 90239980]

約数ペア:

[(1, 90239980), (2, 45119990), (4, 22559995), (5, 18047996), (10, 9023998), (20, 4511999), (641, 140780), (1282, 70390), (2564, 35195), (3205, 28156), (6410, 14078), (7039, 12820)]