19739420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{13901}}^1$

素因数の和:13981

約数の個数: 24

約数和(自身を含む): 42039648

約数和(自身を除く): 22300228

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 13901, 27802, 55604, 69505, 139010, 278020, 986971, 1973942, 3947884, 4934855, 9869710, 19739420]

約数ペア:

[(1, 19739420), (2, 9869710), (4, 4934855), (5, 3947884), (10, 1973942), (20, 986971), (71, 278020), (142, 139010), (284, 69505), (355, 55604), (710, 27802), (1420, 13901)]