64821560

素因数分解:

$2^3\times 5^1\times {\mathrm{1620539}}^1$

素因数の和:1620550

約数の個数: 16

約数和(自身を含む): 145848600

約数和(自身を除く): 81027040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1620539, 3241078, 6482156, 8102695, 12964312, 16205390, 32410780, 64821560]

約数ペア:

[(1, 64821560), (2, 32410780), (4, 16205390), (5, 12964312), (8, 8102695), (10, 6482156), (20, 3241078), (40, 1620539)]