81410240

素因数分解:

$2^6\times 5^1\times {\mathrm{254407}}^1$

素因数の和:254424

約数の個数: 28

約数和(自身を含む): 193858896

約数和(自身を除く): 112448656

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 254407, 508814, 1017628, 1272035, 2035256, 2544070, 4070512, 5088140, 8141024, 10176280, 16282048, 20352560, 40705120, 81410240]

約数ペア:

[(1, 81410240), (2, 40705120), (4, 20352560), (5, 16282048), (8, 10176280), (10, 8141024), (16, 5088140), (20, 4070512), (32, 2544070), (40, 2035256), (64, 1272035), (80, 1017628), (160, 508814), (320, 254407)]