21537710

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{401}}^1$

素因数の和:580

約数の個数: 32

約数和(自身を含む): 40116384

約数和(自身を除く): 18578674

約数列:

[1, 2, 5, 10, 41, 82, 131, 205, 262, 401, 410, 655, 802, 1310, 2005, 4010, 5371, 10742, 16441, 26855, 32882, 52531, 53710, 82205, 105062, 164410, 262655, 525310, 2153771, 4307542, 10768855, 21537710]

約数ペア:

[(1, 21537710), (2, 10768855), (5, 4307542), (10, 2153771), (41, 525310), (82, 262655), (131, 164410), (205, 105062), (262, 82205), (401, 53710), (410, 52531), (655, 32882), (802, 26855), (1310, 16441), (2005, 10742), (4010, 5371)]