19604920

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5507}}^1$

素因数の和:5607

約数の個数: 32

約数和(自身を含む): 44614800

約数和(自身を除く): 25009880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5507, 11014, 22028, 27535, 44056, 55070, 110140, 220280, 490123, 980246, 1960492, 2450615, 3920984, 4901230, 9802460, 19604920]

約数ペア:

[(1, 19604920), (2, 9802460), (4, 4901230), (5, 3920984), (8, 2450615), (10, 1960492), (20, 980246), (40, 490123), (89, 220280), (178, 110140), (356, 55070), (445, 44056), (712, 27535), (890, 22028), (1780, 11014), (3560, 5507)]