21787395

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1$

素因数の和:264

約数の個数: 64

約数和(自身を含む): 42823680

約数和(自身を除く): 21036285

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 67, 95, 105, 133, 163, 201, 285, 335, 399, 469, 489, 665, 815, 1005, 1141, 1273, 1407, 1995, 2345, 2445, 3097, 3423, 3819, 5705, 6365, 7035, 8911, 9291, 10921, 15485, 17115, 19095, 21679, 26733, 32763, 44555, 46455, 54605, 65037, 76447, 108395, 133665, 163815, 207499, 229341, 325185, 382235, 622497, 1037495, 1146705, 1452493, 3112485, 4357479, 7262465, 21787395]

約数ペア:

[(1, 21787395), (3, 7262465), (5, 4357479), (7, 3112485), (15, 1452493), (19, 1146705), (21, 1037495), (35, 622497), (57, 382235), (67, 325185), (95, 229341), (105, 207499), (133, 163815), (163, 133665), (201, 108395), (285, 76447), (335, 65037), (399, 54605), (469, 46455), (489, 44555), (665, 32763), (815, 26733), (1005, 21679), (1141, 19095), (1273, 17115), (1407, 15485), (1995, 10921), (2345, 9291), (2445, 8911), (3097, 7035), (3423, 6365), (3819, 5705)]