21111856

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{97}}^1\times {\mathrm{223}}^1$

素因数の和:389

約数の個数: 40

約数和(自身を含む): 42191744

約数和(自身を除く): 21079888

約数列:

[1, 2, 4, 8, 16, 61, 97, 122, 194, 223, 244, 388, 446, 488, 776, 892, 976, 1552, 1784, 3568, 5917, 11834, 13603, 21631, 23668, 27206, 43262, 47336, 54412, 86524, 94672, 108824, 173048, 217648, 346096, 1319491, 2638982, 5277964, 10555928, 21111856]

約数ペア:

[(1, 21111856), (2, 10555928), (4, 5277964), (8, 2638982), (16, 1319491), (61, 346096), (97, 217648), (122, 173048), (194, 108824), (223, 94672), (244, 86524), (388, 54412), (446, 47336), (488, 43262), (776, 27206), (892, 23668), (976, 21631), (1552, 13603), (1784, 11834), (3568, 5917)]