248578780

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{359}}^1\times {\mathrm{389}}^1$

素因数の和:846

約数の個数: 48

約数和(自身を含む): 530712000

約数和(自身を除く): 282133220

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 359, 389, 445, 718, 778, 890, 1436, 1556, 1780, 1795, 1945, 3590, 3890, 7180, 7780, 31951, 34621, 63902, 69242, 127804, 138484, 139651, 159755, 173105, 279302, 319510, 346210, 558604, 639020, 692420, 698255, 1396510, 2793020, 12428939, 24857878, 49715756, 62144695, 124289390, 248578780]

約数ペア:

[(1, 248578780), (2, 124289390), (4, 62144695), (5, 49715756), (10, 24857878), (20, 12428939), (89, 2793020), (178, 1396510), (356, 698255), (359, 692420), (389, 639020), (445, 558604), (718, 346210), (778, 319510), (890, 279302), (1436, 173105), (1556, 159755), (1780, 139651), (1795, 138484), (1945, 127804), (3590, 69242), (3890, 63902), (7180, 34621), (7780, 31951)]