21668075

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1$

素因数の和:93

約数の個数: 72

約数和(自身を含む): 34633200

約数和(自身を除く): 12965125

約数列:

[1, 5, 11, 13, 19, 25, 29, 55, 65, 95, 121, 143, 145, 209, 247, 275, 319, 325, 377, 475, 551, 605, 715, 725, 1045, 1235, 1573, 1595, 1885, 2299, 2717, 2755, 3025, 3509, 3575, 4147, 5225, 6061, 6175, 7163, 7865, 7975, 9425, 11495, 13585, 13775, 17545, 20735, 29887, 30305, 35815, 39325, 45617, 57475, 66671, 67925, 78793, 87725, 103675, 149435, 151525, 179075, 228085, 333355, 393965, 747175, 866723, 1140425, 1666775, 1969825, 4333615, 21668075]

約数ペア:

[(1, 21668075), (5, 4333615), (11, 1969825), (13, 1666775), (19, 1140425), (25, 866723), (29, 747175), (55, 393965), (65, 333355), (95, 228085), (121, 179075), (143, 151525), (145, 149435), (209, 103675), (247, 87725), (275, 78793), (319, 67925), (325, 66671), (377, 57475), (475, 45617), (551, 39325), (605, 35815), (715, 30305), (725, 29887), (1045, 20735), (1235, 17545), (1573, 13775), (1595, 13585), (1885, 11495), (2299, 9425), (2717, 7975), (2755, 7865), (3025, 7163), (3509, 6175), (3575, 6061), (4147, 5225)]