18171725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1$

素因数の和:87

約数の個数: 72

約数和(自身を含む): 29408832

約数和(自身を除く): 11237107

約数列:

[1, 5, 11, 13, 17, 23, 25, 55, 65, 85, 115, 143, 169, 187, 221, 253, 275, 299, 325, 391, 425, 575, 715, 845, 935, 1105, 1265, 1495, 1859, 1955, 2431, 2873, 3289, 3575, 3887, 4225, 4301, 4675, 5083, 5525, 6325, 7475, 9295, 9775, 12155, 14365, 16445, 19435, 21505, 25415, 31603, 42757, 46475, 55913, 60775, 66079, 71825, 82225, 97175, 107525, 127075, 158015, 213785, 279565, 330395, 726869, 790075, 1068925, 1397825, 1651975, 3634345, 18171725]

約数ペア:

[(1, 18171725), (5, 3634345), (11, 1651975), (13, 1397825), (17, 1068925), (23, 790075), (25, 726869), (55, 330395), (65, 279565), (85, 213785), (115, 158015), (143, 127075), (169, 107525), (187, 97175), (221, 82225), (253, 71825), (275, 66079), (299, 60775), (325, 55913), (391, 46475), (425, 42757), (575, 31603), (715, 25415), (845, 21505), (935, 19435), (1105, 16445), (1265, 14365), (1495, 12155), (1859, 9775), (1955, 9295), (2431, 7475), (2873, 6325), (3289, 5525), (3575, 5083), (3887, 4675), (4225, 4301)]