21254860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8783}}^1$

素因数の和:8814

約数の個数: 36

約数和(自身を含む): 49067424

約数和(自身を除く): 27812564

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8783, 17566, 35132, 43915, 87830, 96613, 175660, 193226, 386452, 483065, 966130, 1062743, 1932260, 2125486, 4250972, 5313715, 10627430, 21254860]

約数ペア:

[(1, 21254860), (2, 10627430), (4, 5313715), (5, 4250972), (10, 2125486), (11, 1932260), (20, 1062743), (22, 966130), (44, 483065), (55, 386452), (110, 193226), (121, 175660), (220, 96613), (242, 87830), (484, 43915), (605, 35132), (1210, 17566), (2420, 8783)]