21491925

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:147

約数の個数: 96

約数和(自身を含む): 45330432

約数和(自身を除く): 23838507

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 47, 65, 67, 75, 91, 105, 141, 175, 195, 201, 235, 273, 325, 329, 335, 455, 469, 525, 611, 705, 871, 975, 987, 1005, 1175, 1365, 1407, 1645, 1675, 1833, 2275, 2345, 2613, 3055, 3149, 3525, 4277, 4355, 4935, 5025, 6097, 6825, 7035, 8225, 9165, 9447, 11725, 12831, 13065, 15275, 15745, 18291, 21385, 21775, 22043, 24675, 30485, 35175, 40937, 45825, 47235, 64155, 65325, 66129, 78725, 91455, 106925, 110215, 122811, 152425, 204685, 236175, 286559, 320775, 330645, 457275, 551075, 614055, 859677, 1023425, 1432795, 1653225, 3070275, 4298385, 7163975, 21491925]

約数ペア:

[(1, 21491925), (3, 7163975), (5, 4298385), (7, 3070275), (13, 1653225), (15, 1432795), (21, 1023425), (25, 859677), (35, 614055), (39, 551075), (47, 457275), (65, 330645), (67, 320775), (75, 286559), (91, 236175), (105, 204685), (141, 152425), (175, 122811), (195, 110215), (201, 106925), (235, 91455), (273, 78725), (325, 66129), (329, 65325), (335, 64155), (455, 47235), (469, 45825), (525, 40937), (611, 35175), (705, 30485), (871, 24675), (975, 22043), (987, 21775), (1005, 21385), (1175, 18291), (1365, 15745), (1407, 15275), (1645, 13065), (1675, 12831), (1833, 11725), (2275, 9447), (2345, 9165), (2613, 8225), (3055, 7035), (3149, 6825), (3525, 6097), (4277, 5025), (4355, 4935)]