20964740

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{313}}^1$

素因数の和:536

約数の個数: 48

約数和(自身を含む): 47002032

約数和(自身を除く): 26037292

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 197, 313, 340, 394, 626, 788, 985, 1252, 1565, 1970, 3130, 3349, 3940, 5321, 6260, 6698, 10642, 13396, 16745, 21284, 26605, 33490, 53210, 61661, 66980, 106420, 123322, 246644, 308305, 616610, 1048237, 1233220, 2096474, 4192948, 5241185, 10482370, 20964740]

約数ペア:

[(1, 20964740), (2, 10482370), (4, 5241185), (5, 4192948), (10, 2096474), (17, 1233220), (20, 1048237), (34, 616610), (68, 308305), (85, 246644), (170, 123322), (197, 106420), (313, 66980), (340, 61661), (394, 53210), (626, 33490), (788, 26605), (985, 21284), (1252, 16745), (1565, 13396), (1970, 10642), (3130, 6698), (3349, 6260), (3940, 5321)]