66687140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{256489}}^1$

素因数の和:256511

約数の個数: 24

約数和(自身を含む): 150816120

約数和(自身を除く): 84128980

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 256489, 512978, 1025956, 1282445, 2564890, 3334357, 5129780, 6668714, 13337428, 16671785, 33343570, 66687140]

約数ペア:

[(1, 66687140), (2, 33343570), (4, 16671785), (5, 13337428), (10, 6668714), (13, 5129780), (20, 3334357), (26, 2564890), (52, 1282445), (65, 1025956), (130, 512978), (260, 256489)]