21621560

素因数分解:

$2^3\times 5^1\times {\mathrm{540539}}^1$

素因数の和:540550

約数の個数: 16

約数和(自身を含む): 48648600

約数和(自身を除く): 27027040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 540539, 1081078, 2162156, 2702695, 4324312, 5405390, 10810780, 21621560]

約数ペア:

[(1, 21621560), (2, 10810780), (4, 5405390), (5, 4324312), (8, 2702695), (10, 2162156), (20, 1081078), (40, 540539)]