20666128

素因数分解:

$2^4\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4987}}^1$

素因数の和:5039

約数の個数: 40

約数和(自身を含む): 47006912

約数和(自身を除く): 26340784

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 37, 56, 74, 112, 148, 259, 296, 518, 592, 1036, 2072, 4144, 4987, 9974, 19948, 34909, 39896, 69818, 79792, 139636, 184519, 279272, 369038, 558544, 738076, 1291633, 1476152, 2583266, 2952304, 5166532, 10333064, 20666128]

約数ペア:

[(1, 20666128), (2, 10333064), (4, 5166532), (7, 2952304), (8, 2583266), (14, 1476152), (16, 1291633), (28, 738076), (37, 558544), (56, 369038), (74, 279272), (112, 184519), (148, 139636), (259, 79792), (296, 69818), (518, 39896), (592, 34909), (1036, 19948), (2072, 9974), (4144, 4987)]