18013900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^2\times {\mathrm{499}}^1$

素因数の和:551

約数の個数: 54

約数和(自身を含む): 41338500

約数和(自身を除く): 23324600

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 361, 380, 475, 499, 722, 950, 998, 1444, 1805, 1900, 1996, 2495, 3610, 4990, 7220, 9025, 9481, 9980, 12475, 18050, 18962, 24950, 36100, 37924, 47405, 49900, 94810, 180139, 189620, 237025, 360278, 474050, 720556, 900695, 948100, 1801390, 3602780, 4503475, 9006950, 18013900]

約数ペア:

[(1, 18013900), (2, 9006950), (4, 4503475), (5, 3602780), (10, 1801390), (19, 948100), (20, 900695), (25, 720556), (38, 474050), (50, 360278), (76, 237025), (95, 189620), (100, 180139), (190, 94810), (361, 49900), (380, 47405), (475, 37924), (499, 36100), (722, 24950), (950, 18962), (998, 18050), (1444, 12475), (1805, 9980), (1900, 9481), (1996, 9025), (2495, 7220), (3610, 4990)]