20784750

素因数分解:

$2^1\times 3^1\times 5^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1$

素因数の和:171

約数の個数: 128

約数和(自身を含む): 61461504

約数和(自身を除く): 40676754

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 25, 30, 35, 37, 42, 50, 70, 74, 75, 105, 107, 111, 125, 150, 175, 185, 210, 214, 222, 250, 259, 321, 350, 370, 375, 518, 525, 535, 555, 642, 749, 750, 777, 875, 925, 1050, 1070, 1110, 1295, 1498, 1554, 1605, 1750, 1850, 2247, 2590, 2625, 2675, 2775, 3210, 3745, 3885, 3959, 4494, 4625, 5250, 5350, 5550, 6475, 7490, 7770, 7918, 8025, 9250, 11235, 11877, 12950, 13375, 13875, 16050, 18725, 19425, 19795, 22470, 23754, 26750, 27713, 27750, 32375, 37450, 38850, 39590, 40125, 55426, 56175, 59385, 64750, 80250, 83139, 93625, 97125, 98975, 112350, 118770, 138565, 166278, 187250, 194250, 197950, 277130, 280875, 296925, 415695, 494875, 561750, 593850, 692825, 831390, 989750, 1385650, 1484625, 2078475, 2969250, 3464125, 4156950, 6928250, 10392375, 20784750]

約数ペア:

[(1, 20784750), (2, 10392375), (3, 6928250), (5, 4156950), (6, 3464125), (7, 2969250), (10, 2078475), (14, 1484625), (15, 1385650), (21, 989750), (25, 831390), (30, 692825), (35, 593850), (37, 561750), (42, 494875), (50, 415695), (70, 296925), (74, 280875), (75, 277130), (105, 197950), (107, 194250), (111, 187250), (125, 166278), (150, 138565), (175, 118770), (185, 112350), (210, 98975), (214, 97125), (222, 93625), (250, 83139), (259, 80250), (321, 64750), (350, 59385), (370, 56175), (375, 55426), (518, 40125), (525, 39590), (535, 38850), (555, 37450), (642, 32375), (749, 27750), (750, 27713), (777, 26750), (875, 23754), (925, 22470), (1050, 19795), (1070, 19425), (1110, 18725), (1295, 16050), (1498, 13875), (1554, 13375), (1605, 12950), (1750, 11877), (1850, 11235), (2247, 9250), (2590, 8025), (2625, 7918), (2675, 7770), (2775, 7490), (3210, 6475), (3745, 5550), (3885, 5350), (3959, 5250), (4494, 4625)]