640344375

素因数分解:

$3^2\times 5^4\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:247

約数の個数: 120

約数和(自身を含む): 1286588160

約数和(自身を除く): 646243785

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 75, 79, 99, 125, 131, 165, 225, 237, 275, 375, 393, 395, 495, 625, 655, 711, 825, 869, 1125, 1179, 1185, 1375, 1441, 1875, 1965, 1975, 2475, 2607, 3275, 3555, 4125, 4323, 4345, 5625, 5895, 5925, 6875, 7205, 7821, 9825, 9875, 10349, 12375, 12969, 13035, 16375, 17775, 20625, 21615, 21725, 29475, 29625, 31047, 36025, 39105, 49125, 49375, 51745, 61875, 64845, 65175, 81875, 88875, 93141, 108075, 108625, 113839, 147375, 148125, 155235, 180125, 195525, 245625, 258725, 324225, 325875, 341517, 444375, 465705, 540375, 543125, 569195, 736875, 776175, 900625, 977625, 1024551, 1293625, 1621125, 1629375, 1707585, 2328525, 2701875, 2845975, 3880875, 4888125, 5122755, 6468125, 8105625, 8537925, 11642625, 14229875, 19404375, 25613775, 42689625, 58213125, 71149375, 128068875, 213448125, 640344375]

約数ペア:

[(1, 640344375), (3, 213448125), (5, 128068875), (9, 71149375), (11, 58213125), (15, 42689625), (25, 25613775), (33, 19404375), (45, 14229875), (55, 11642625), (75, 8537925), (79, 8105625), (99, 6468125), (125, 5122755), (131, 4888125), (165, 3880875), (225, 2845975), (237, 2701875), (275, 2328525), (375, 1707585), (393, 1629375), (395, 1621125), (495, 1293625), (625, 1024551), (655, 977625), (711, 900625), (825, 776175), (869, 736875), (1125, 569195), (1179, 543125), (1185, 540375), (1375, 465705), (1441, 444375), (1875, 341517), (1965, 325875), (1975, 324225), (2475, 258725), (2607, 245625), (3275, 195525), (3555, 180125), (4125, 155235), (4323, 148125), (4345, 147375), (5625, 113839), (5895, 108625), (5925, 108075), (6875, 93141), (7205, 88875), (7821, 81875), (9825, 65175), (9875, 64845), (10349, 61875), (12375, 51745), (12969, 49375), (13035, 49125), (16375, 39105), (17775, 36025), (20625, 31047), (21615, 29625), (21725, 29475)]