258689720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{150401}}^1$

素因数の和:150455

約数の個数: 32

約数和(自身を含む): 595591920

約数和(自身を除く): 336902200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 150401, 300802, 601604, 752005, 1203208, 1504010, 3008020, 6016040, 6467243, 12934486, 25868972, 32336215, 51737944, 64672430, 129344860, 258689720]

約数ペア:

[(1, 258689720), (2, 129344860), (4, 64672430), (5, 51737944), (8, 32336215), (10, 25868972), (20, 12934486), (40, 6467243), (43, 6016040), (86, 3008020), (172, 1504010), (215, 1203208), (344, 752005), (430, 601604), (860, 300802), (1720, 150401)]