9991961

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{173}}^1\times {\mathrm{223}}^1$

素因数の和:440

約数の個数: 16

約数和(自身を含む): 11848704

約数和(自身を除く): 1856743

約数列:

[1, 7, 37, 173, 223, 259, 1211, 1561, 6401, 8251, 38579, 44807, 57757, 270053, 1427423, 9991961]

約数ペア:

[(1, 9991961), (7, 1427423), (37, 270053), (173, 57757), (223, 44807), (259, 38579), (1211, 8251), (1561, 6401)]