21645680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{38653}}^1$

素因数の和:38673

約数の個数: 40

約数和(自身を含む): 57517152

約数和(自身を除く): 35871472

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 38653, 77306, 154612, 193265, 270571, 309224, 386530, 541142, 618448, 773060, 1082284, 1352855, 1546120, 2164568, 2705710, 3092240, 4329136, 5411420, 10822840, 21645680]

約数ペア:

[(1, 21645680), (2, 10822840), (4, 5411420), (5, 4329136), (7, 3092240), (8, 2705710), (10, 2164568), (14, 1546120), (16, 1352855), (20, 1082284), (28, 773060), (35, 618448), (40, 541142), (56, 386530), (70, 309224), (80, 270571), (112, 193265), (140, 154612), (280, 77306), (560, 38653)]