20396420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{1117}}^1$

素因数の和:1220

約数の個数: 48

約数和(自身を含む): 47331648

約数和(自身を除く): 26935228

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 83, 110, 166, 220, 332, 415, 830, 913, 1117, 1660, 1826, 2234, 3652, 4468, 4565, 5585, 9130, 11170, 12287, 18260, 22340, 24574, 49148, 61435, 92711, 122870, 185422, 245740, 370844, 463555, 927110, 1019821, 1854220, 2039642, 4079284, 5099105, 10198210, 20396420]

約数ペア:

[(1, 20396420), (2, 10198210), (4, 5099105), (5, 4079284), (10, 2039642), (11, 1854220), (20, 1019821), (22, 927110), (44, 463555), (55, 370844), (83, 245740), (110, 185422), (166, 122870), (220, 92711), (332, 61435), (415, 49148), (830, 24574), (913, 22340), (1117, 18260), (1660, 12287), (1826, 11170), (2234, 9130), (3652, 5585), (4468, 4565)]