21000369728

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{25240829}}^1$

素因数の和:25240854

約数の個数: 28

約数和(自身を含む): 44878195740

約数和(自身を除く): 23877826012

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 208, 416, 832, 25240829, 50481658, 100963316, 201926632, 328130777, 403853264, 656261554, 807706528, 1312523108, 1615413056, 2625046216, 5250092432, 10500184864, 21000369728]

約数ペア:

[(1, 21000369728), (2, 10500184864), (4, 5250092432), (8, 2625046216), (13, 1615413056), (16, 1312523108), (26, 807706528), (32, 656261554), (52, 403853264), (64, 328130777), (104, 201926632), (208, 100963316), (416, 50481658), (832, 25240829)]