21679970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{2111}}^1$

素因数の和:2210

約数の個数: 32

約数和(自身を含む): 42577920

約数和(自身を除く): 20897950

約数列:

[1, 2, 5, 10, 13, 26, 65, 79, 130, 158, 395, 790, 1027, 2054, 2111, 4222, 5135, 10270, 10555, 21110, 27443, 54886, 137215, 166769, 274430, 333538, 833845, 1667690, 2167997, 4335994, 10839985, 21679970]

約数ペア:

[(1, 21679970), (2, 10839985), (5, 4335994), (10, 2167997), (13, 1667690), (26, 833845), (65, 333538), (79, 274430), (130, 166769), (158, 137215), (395, 54886), (790, 27443), (1027, 21110), (2054, 10555), (2111, 10270), (4222, 5135)]