21421840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{2213}}^1$

素因数の和:2248

約数の個数: 60

約数和(自身を含む): 54769932

約数和(自身を除く): 33348092

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 121, 176, 220, 242, 440, 484, 605, 880, 968, 1210, 1936, 2213, 2420, 4426, 4840, 8852, 9680, 11065, 17704, 22130, 24343, 35408, 44260, 48686, 88520, 97372, 121715, 177040, 194744, 243430, 267773, 389488, 486860, 535546, 973720, 1071092, 1338865, 1947440, 2142184, 2677730, 4284368, 5355460, 10710920, 21421840]

約数ペア:

[(1, 21421840), (2, 10710920), (4, 5355460), (5, 4284368), (8, 2677730), (10, 2142184), (11, 1947440), (16, 1338865), (20, 1071092), (22, 973720), (40, 535546), (44, 486860), (55, 389488), (80, 267773), (88, 243430), (110, 194744), (121, 177040), (176, 121715), (220, 97372), (242, 88520), (440, 48686), (484, 44260), (605, 35408), (880, 24343), (968, 22130), (1210, 17704), (1936, 11065), (2213, 9680), (2420, 8852), (4426, 4840)]