21289600

素因数分解:

$2^7\times 5^2\times {\mathrm{6653}}^1$

素因数の和:6677

約数の個数: 48

約数和(自身を含む): 52599870

約数和(自身を除く): 31310270

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 320, 400, 640, 800, 1600, 3200, 6653, 13306, 26612, 33265, 53224, 66530, 106448, 133060, 166325, 212896, 266120, 332650, 425792, 532240, 665300, 851584, 1064480, 1330600, 2128960, 2661200, 4257920, 5322400, 10644800, 21289600]

約数ペア:

[(1, 21289600), (2, 10644800), (4, 5322400), (5, 4257920), (8, 2661200), (10, 2128960), (16, 1330600), (20, 1064480), (25, 851584), (32, 665300), (40, 532240), (50, 425792), (64, 332650), (80, 266120), (100, 212896), (128, 166325), (160, 133060), (200, 106448), (320, 66530), (400, 53224), (640, 33265), (800, 26612), (1600, 13306), (3200, 6653)]