64406420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{247717}}^1$

素因数の和:247739

約数の個数: 24

約数和(自身を含む): 145658184

約数和(自身を除く): 81251764

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 247717, 495434, 990868, 1238585, 2477170, 3220321, 4954340, 6440642, 12881284, 16101605, 32203210, 64406420]

約数ペア:

[(1, 64406420), (2, 32203210), (4, 16101605), (5, 12881284), (10, 6440642), (13, 4954340), (20, 3220321), (26, 2477170), (52, 1238585), (65, 990868), (130, 495434), (260, 247717)]