20922680

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{3209}}^1$

素因数の和:3383

約数の個数: 32

約数和(自身を含む): 47379600

約数和(自身を除く): 26456920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3209, 3260, 6418, 6520, 12836, 16045, 25672, 32090, 64180, 128360, 523067, 1046134, 2092268, 2615335, 4184536, 5230670, 10461340, 20922680]

約数ペア:

[(1, 20922680), (2, 10461340), (4, 5230670), (5, 4184536), (8, 2615335), (10, 2092268), (20, 1046134), (40, 523067), (163, 128360), (326, 64180), (652, 32090), (815, 25672), (1304, 16045), (1630, 12836), (3209, 6520), (3260, 6418)]