21025810

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{821}}^1$

素因数の和:1038

約数の個数: 32

約数和(自身を含む): 41014512

約数和(自身を除く): 19988702

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 197, 394, 821, 985, 1642, 1970, 2561, 4105, 5122, 8210, 10673, 12805, 21346, 25610, 53365, 106730, 161737, 323474, 808685, 1617370, 2102581, 4205162, 10512905, 21025810]

約数ペア:

[(1, 21025810), (2, 10512905), (5, 4205162), (10, 2102581), (13, 1617370), (26, 808685), (65, 323474), (130, 161737), (197, 106730), (394, 53365), (821, 25610), (985, 21346), (1642, 12805), (1970, 10673), (2561, 8210), (4105, 5122)]