21516800

素因数分解:

$2^9\times 5^2\times {\mathrm{41}}^2$

素因数の和:110

約数の個数: 90

約数和(自身を含む): 54641499

約数和(自身を除く): 33124699

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 41, 50, 64, 80, 82, 100, 128, 160, 164, 200, 205, 256, 320, 328, 400, 410, 512, 640, 656, 800, 820, 1025, 1280, 1312, 1600, 1640, 1681, 2050, 2560, 2624, 3200, 3280, 3362, 4100, 5248, 6400, 6560, 6724, 8200, 8405, 10496, 12800, 13120, 13448, 16400, 16810, 20992, 26240, 26896, 32800, 33620, 42025, 52480, 53792, 65600, 67240, 84050, 104960, 107584, 131200, 134480, 168100, 215168, 262400, 268960, 336200, 430336, 524800, 537920, 672400, 860672, 1075840, 1344800, 2151680, 2689600, 4303360, 5379200, 10758400, 21516800]

約数ペア:

[(1, 21516800), (2, 10758400), (4, 5379200), (5, 4303360), (8, 2689600), (10, 2151680), (16, 1344800), (20, 1075840), (25, 860672), (32, 672400), (40, 537920), (41, 524800), (50, 430336), (64, 336200), (80, 268960), (82, 262400), (100, 215168), (128, 168100), (160, 134480), (164, 131200), (200, 107584), (205, 104960), (256, 84050), (320, 67240), (328, 65600), (400, 53792), (410, 52480), (512, 42025), (640, 33620), (656, 32800), (800, 26896), (820, 26240), (1025, 20992), (1280, 16810), (1312, 16400), (1600, 13448), (1640, 13120), (1681, 12800), (2050, 10496), (2560, 8405), (2624, 8200), (3200, 6724), (3280, 6560), (3362, 6400), (4100, 5248)]