7872940

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{4423}}^1$

素因数の和:4521

約数の個数: 24

約数和(自身を含む): 16722720

約数和(自身を除く): 8849780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 4423, 8846, 17692, 22115, 44230, 88460, 393647, 787294, 1574588, 1968235, 3936470, 7872940]

約数ペア:

[(1, 7872940), (2, 3936470), (4, 1968235), (5, 1574588), (10, 787294), (20, 393647), (89, 88460), (178, 44230), (356, 22115), (445, 17692), (890, 8846), (1780, 4423)]