77890640

素因数分解:

$2^4\times 5^1\times {\mathrm{631}}^1\times {\mathrm{1543}}^1$

素因数の和:2187

約数の個数: 40

約数和(自身を含む): 181500288

約数和(自身を除く): 103609648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 631, 1262, 1543, 2524, 3086, 3155, 5048, 6172, 6310, 7715, 10096, 12344, 12620, 15430, 24688, 25240, 30860, 50480, 61720, 123440, 973633, 1947266, 3894532, 4868165, 7789064, 9736330, 15578128, 19472660, 38945320, 77890640]

約数ペア:

[(1, 77890640), (2, 38945320), (4, 19472660), (5, 15578128), (8, 9736330), (10, 7789064), (16, 4868165), (20, 3894532), (40, 1947266), (80, 973633), (631, 123440), (1262, 61720), (1543, 50480), (2524, 30860), (3086, 25240), (3155, 24688), (5048, 15430), (6172, 12620), (6310, 12344), (7715, 10096)]