21380920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48593}}^1$

素因数の和:48615

約数の個数: 32

約数和(自身を含む): 52481520

約数和(自身を除く): 31100600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48593, 97186, 194372, 242965, 388744, 485930, 534523, 971860, 1069046, 1943720, 2138092, 2672615, 4276184, 5345230, 10690460, 21380920]

約数ペア:

[(1, 21380920), (2, 10690460), (4, 5345230), (5, 4276184), (8, 2672615), (10, 2138092), (11, 1943720), (20, 1069046), (22, 971860), (40, 534523), (44, 485930), (55, 388744), (88, 242965), (110, 194372), (220, 97186), (440, 48593)]