20813840

素因数分解:

$2^4\times 5^1\times {\mathrm{151}}^1\times {\mathrm{1723}}^1$

素因数の和:1887

約数の個数: 40

約数和(自身を含む): 48740928

約数和(自身を除く): 27927088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 151, 302, 604, 755, 1208, 1510, 1723, 2416, 3020, 3446, 6040, 6892, 8615, 12080, 13784, 17230, 27568, 34460, 68920, 137840, 260173, 520346, 1040692, 1300865, 2081384, 2601730, 4162768, 5203460, 10406920, 20813840]

約数ペア:

[(1, 20813840), (2, 10406920), (4, 5203460), (5, 4162768), (8, 2601730), (10, 2081384), (16, 1300865), (20, 1040692), (40, 520346), (80, 260173), (151, 137840), (302, 68920), (604, 34460), (755, 27568), (1208, 17230), (1510, 13784), (1723, 12080), (2416, 8615), (3020, 6892), (3446, 6040)]