21298840

素因数分解:

$2^3\times 5^1\times {\mathrm{617}}^1\times {\mathrm{863}}^1$

素因数の和:1491

約数の個数: 32

約数和(自身を含む): 48055680

約数和(自身を除く): 26756840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 617, 863, 1234, 1726, 2468, 3085, 3452, 4315, 4936, 6170, 6904, 8630, 12340, 17260, 24680, 34520, 532471, 1064942, 2129884, 2662355, 4259768, 5324710, 10649420, 21298840]

約数ペア:

[(1, 21298840), (2, 10649420), (4, 5324710), (5, 4259768), (8, 2662355), (10, 2129884), (20, 1064942), (40, 532471), (617, 34520), (863, 24680), (1234, 17260), (1726, 12340), (2468, 8630), (3085, 6904), (3452, 6170), (4315, 4936)]