398521280

素因数分解:

$2^6\times 5^1\times {\mathrm{1245379}}^1$

素因数の和:1245396

約数の個数: 28

約数和(自身を含む): 948979560

約数和(自身を除く): 550458280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 1245379, 2490758, 4981516, 6226895, 9963032, 12453790, 19926064, 24907580, 39852128, 49815160, 79704256, 99630320, 199260640, 398521280]

約数ペア:

[(1, 398521280), (2, 199260640), (4, 99630320), (5, 79704256), (8, 49815160), (10, 39852128), (16, 24907580), (20, 19926064), (32, 12453790), (40, 9963032), (64, 6226895), (80, 4981516), (160, 2490758), (320, 1245379)]