21700480

素因数分解:

$2^7\times 5^1\times {\mathrm{41}}^1\times {\mathrm{827}}^1$

素因数の和:887

約数の個数: 64

約数和(自身を含む): 53207280

約数和(自身を除く): 31506800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 320, 328, 410, 640, 656, 820, 827, 1312, 1640, 1654, 2624, 3280, 3308, 4135, 5248, 6560, 6616, 8270, 13120, 13232, 16540, 26240, 26464, 33080, 33907, 52928, 66160, 67814, 105856, 132320, 135628, 169535, 264640, 271256, 339070, 529280, 542512, 678140, 1085024, 1356280, 2170048, 2712560, 4340096, 5425120, 10850240, 21700480]

約数ペア:

[(1, 21700480), (2, 10850240), (4, 5425120), (5, 4340096), (8, 2712560), (10, 2170048), (16, 1356280), (20, 1085024), (32, 678140), (40, 542512), (41, 529280), (64, 339070), (80, 271256), (82, 264640), (128, 169535), (160, 135628), (164, 132320), (205, 105856), (320, 67814), (328, 66160), (410, 52928), (640, 33907), (656, 33080), (820, 26464), (827, 26240), (1312, 16540), (1640, 13232), (1654, 13120), (2624, 8270), (3280, 6616), (3308, 6560), (4135, 5248)]