64216720

素因数分解:

$2^4\times 5^1\times {\mathrm{802709}}^1$

素因数の和:802722

約数の個数: 20

約数和(自身を含む): 149304060

約数和(自身を除く): 85087340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 802709, 1605418, 3210836, 4013545, 6421672, 8027090, 12843344, 16054180, 32108360, 64216720]

約数ペア:

[(1, 64216720), (2, 32108360), (4, 16054180), (5, 12843344), (8, 8027090), (10, 6421672), (16, 4013545), (20, 3210836), (40, 1605418), (80, 802709)]