20921840

素因数分解:

$2^4\times 5^1\times {\mathrm{261523}}^1$

素因数の和:261536

約数の個数: 20

約数和(自身を含む): 48643464

約数和(自身を除く): 27721624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261523, 523046, 1046092, 1307615, 2092184, 2615230, 4184368, 5230460, 10460920, 20921840]

約数ペア:

[(1, 20921840), (2, 10460920), (4, 5230460), (5, 4184368), (8, 2615230), (10, 2092184), (16, 1307615), (20, 1046092), (40, 523046), (80, 261523)]