21605560

素因数分解:

$2^3\times 5^1\times {\mathrm{540139}}^1$

素因数の和:540150

約数の個数: 16

約数和(自身を含む): 48612600

約数和(自身を除く): 27007040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 540139, 1080278, 2160556, 2700695, 4321112, 5401390, 10802780, 21605560]

約数ペア:

[(1, 21605560), (2, 10802780), (4, 5401390), (5, 4321112), (8, 2700695), (10, 2160556), (20, 1080278), (40, 540139)]