20038840

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2543}}^1$

素因数の和:2751

約数の個数: 32

約数和(自身を含む): 45334080

約数和(自身を除く): 25295240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2543, 3940, 5086, 7880, 10172, 12715, 20344, 25430, 50860, 101720, 500971, 1001942, 2003884, 2504855, 4007768, 5009710, 10019420, 20038840]

約数ペア:

[(1, 20038840), (2, 10019420), (4, 5009710), (5, 4007768), (8, 2504855), (10, 2003884), (20, 1001942), (40, 500971), (197, 101720), (394, 50860), (788, 25430), (985, 20344), (1576, 12715), (1970, 10172), (2543, 7880), (3940, 5086)]