21998990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{859}}^1$

素因数の和:1076

約数の個数: 32

約数和(自身を含む): 42910560

約数和(自身を除く): 20911570

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 197, 394, 859, 985, 1718, 1970, 2561, 4295, 5122, 8590, 11167, 12805, 22334, 25610, 55835, 111670, 169223, 338446, 846115, 1692230, 2199899, 4399798, 10999495, 21998990]

約数ペア:

[(1, 21998990), (2, 10999495), (5, 4399798), (10, 2199899), (13, 1692230), (26, 846115), (65, 338446), (130, 169223), (197, 111670), (394, 55835), (859, 25610), (985, 22334), (1718, 12805), (1970, 11167), (2561, 8590), (4295, 5122)]