20987456

素因数分解:

$2^6\times 7^1\times {\mathrm{79}}^1\times {\mathrm{593}}^1$

素因数の和:691

約数の個数: 56

約数和(自身を含む): 48280320

約数和(自身を除く): 27292864

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 79, 112, 158, 224, 316, 448, 553, 593, 632, 1106, 1186, 1264, 2212, 2372, 2528, 4151, 4424, 4744, 5056, 8302, 8848, 9488, 16604, 17696, 18976, 33208, 35392, 37952, 46847, 66416, 93694, 132832, 187388, 265664, 327929, 374776, 655858, 749552, 1311716, 1499104, 2623432, 2998208, 5246864, 10493728, 20987456]

約数ペア:

[(1, 20987456), (2, 10493728), (4, 5246864), (7, 2998208), (8, 2623432), (14, 1499104), (16, 1311716), (28, 749552), (32, 655858), (56, 374776), (64, 327929), (79, 265664), (112, 187388), (158, 132832), (224, 93694), (316, 66416), (448, 46847), (553, 37952), (593, 35392), (632, 33208), (1106, 18976), (1186, 17696), (1264, 16604), (2212, 9488), (2372, 8848), (2528, 8302), (4151, 5056), (4424, 4744)]