20561492

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 42900480

約数和(自身を除く): 22338988

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 89, 148, 178, 223, 259, 356, 446, 518, 623, 892, 1036, 1246, 1561, 2492, 3122, 3293, 6244, 6586, 8251, 13172, 16502, 19847, 23051, 33004, 39694, 46102, 57757, 79388, 92204, 115514, 138929, 231028, 277858, 555716, 734339, 1468678, 2937356, 5140373, 10280746, 20561492]

約数ペア:

[(1, 20561492), (2, 10280746), (4, 5140373), (7, 2937356), (14, 1468678), (28, 734339), (37, 555716), (74, 277858), (89, 231028), (148, 138929), (178, 115514), (223, 92204), (259, 79388), (356, 57757), (446, 46102), (518, 39694), (623, 33004), (892, 23051), (1036, 19847), (1246, 16502), (1561, 13172), (2492, 8251), (3122, 6586), (3293, 6244)]