21257220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{347}}^1\times {\mathrm{1021}}^1$

素因数の和:1380

約数の個数: 48

約数和(自身を含む): 59750208

約数和(自身を除く): 38492988

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 347, 694, 1021, 1041, 1388, 1735, 2042, 2082, 3063, 3470, 4084, 4164, 5105, 5205, 6126, 6940, 10210, 10410, 12252, 15315, 20420, 20820, 30630, 61260, 354287, 708574, 1062861, 1417148, 1771435, 2125722, 3542870, 4251444, 5314305, 7085740, 10628610, 21257220]

約数ペア:

[(1, 21257220), (2, 10628610), (3, 7085740), (4, 5314305), (5, 4251444), (6, 3542870), (10, 2125722), (12, 1771435), (15, 1417148), (20, 1062861), (30, 708574), (60, 354287), (347, 61260), (694, 30630), (1021, 20820), (1041, 20420), (1388, 15315), (1735, 12252), (2042, 10410), (2082, 10210), (3063, 6940), (3470, 6126), (4084, 5205), (4164, 5105)]