21427910

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{443}}^1\times {\mathrm{691}}^1$

素因数の和:1148

約数の個数: 32

約数和(自身を含む): 44243712

約数和(自身を除く): 22815802

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 443, 691, 886, 1382, 2215, 3101, 3455, 4430, 4837, 6202, 6910, 9674, 15505, 24185, 31010, 48370, 306113, 612226, 1530565, 2142791, 3061130, 4285582, 10713955, 21427910]

約数ペア:

[(1, 21427910), (2, 10713955), (5, 4285582), (7, 3061130), (10, 2142791), (14, 1530565), (35, 612226), (70, 306113), (443, 48370), (691, 31010), (886, 24185), (1382, 15505), (2215, 9674), (3101, 6910), (3455, 6202), (4430, 4837)]