21244520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{911}}^1$

素因数の和:986

約数の個数: 64

約数和(自身を含む): 53187840

約数和(自身を除く): 31943320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 53, 55, 88, 106, 110, 212, 220, 265, 424, 440, 530, 583, 911, 1060, 1166, 1822, 2120, 2332, 2915, 3644, 4555, 4664, 5830, 7288, 9110, 10021, 11660, 18220, 20042, 23320, 36440, 40084, 48283, 50105, 80168, 96566, 100210, 193132, 200420, 241415, 386264, 400840, 482830, 531113, 965660, 1062226, 1931320, 2124452, 2655565, 4248904, 5311130, 10622260, 21244520]

約数ペア:

[(1, 21244520), (2, 10622260), (4, 5311130), (5, 4248904), (8, 2655565), (10, 2124452), (11, 1931320), (20, 1062226), (22, 965660), (40, 531113), (44, 482830), (53, 400840), (55, 386264), (88, 241415), (106, 200420), (110, 193132), (212, 100210), (220, 96566), (265, 80168), (424, 50105), (440, 48283), (530, 40084), (583, 36440), (911, 23320), (1060, 20042), (1166, 18220), (1822, 11660), (2120, 10021), (2332, 9110), (2915, 7288), (3644, 5830), (4555, 4664)]