421726720

素因数分解:

$2^9\times 5^1\times {\mathrm{257}}^1\times {\mathrm{641}}^1$

素因数の和:921

約数の個数: 80

約数和(自身を含む): 1016673768

約数和(自身を除く): 594947048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 257, 320, 512, 514, 640, 641, 1028, 1280, 1282, 1285, 2056, 2560, 2564, 2570, 3205, 4112, 5128, 5140, 6410, 8224, 10256, 10280, 12820, 16448, 20512, 20560, 25640, 32896, 41024, 41120, 51280, 65792, 82048, 82240, 102560, 131584, 164096, 164480, 164737, 205120, 328192, 328960, 329474, 410240, 657920, 658948, 820480, 823685, 1317896, 1640960, 1647370, 2635792, 3294740, 5271584, 6589480, 10543168, 13178960, 21086336, 26357920, 42172672, 52715840, 84345344, 105431680, 210863360, 421726720]

約数ペア:

[(1, 421726720), (2, 210863360), (4, 105431680), (5, 84345344), (8, 52715840), (10, 42172672), (16, 26357920), (20, 21086336), (32, 13178960), (40, 10543168), (64, 6589480), (80, 5271584), (128, 3294740), (160, 2635792), (256, 1647370), (257, 1640960), (320, 1317896), (512, 823685), (514, 820480), (640, 658948), (641, 657920), (1028, 410240), (1280, 329474), (1282, 328960), (1285, 328192), (2056, 205120), (2560, 164737), (2564, 164480), (2570, 164096), (3205, 131584), (4112, 102560), (5128, 82240), (5140, 82048), (6410, 65792), (8224, 51280), (10256, 41120), (10280, 41024), (12820, 32896), (16448, 25640), (20512, 20560)]