21384970

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{257}}^1$

素因数の和:474

約数の個数: 32

約数和(自身を含む): 39622608

約数和(自身を除く): 18237638

約数列:

[1, 2, 5, 10, 53, 106, 157, 257, 265, 314, 514, 530, 785, 1285, 1570, 2570, 8321, 13621, 16642, 27242, 40349, 41605, 68105, 80698, 83210, 136210, 201745, 403490, 2138497, 4276994, 10692485, 21384970]

約数ペア:

[(1, 21384970), (2, 10692485), (5, 4276994), (10, 2138497), (53, 403490), (106, 201745), (157, 136210), (257, 83210), (265, 80698), (314, 68105), (514, 41605), (530, 40349), (785, 27242), (1285, 16642), (1570, 13621), (2570, 8321)]