21258128

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{149}}^1\times {\mathrm{241}}^1$

素因数の和:435

約数の個数: 40

約数和(自身を含む): 42761400

約数和(自身を除く): 21503272

約数列:

[1, 2, 4, 8, 16, 37, 74, 148, 149, 241, 296, 298, 482, 592, 596, 964, 1192, 1928, 2384, 3856, 5513, 8917, 11026, 17834, 22052, 35668, 35909, 44104, 71336, 71818, 88208, 142672, 143636, 287272, 574544, 1328633, 2657266, 5314532, 10629064, 21258128]

約数ペア:

[(1, 21258128), (2, 10629064), (4, 5314532), (8, 2657266), (16, 1328633), (37, 574544), (74, 287272), (148, 143636), (149, 142672), (241, 88208), (296, 71818), (298, 71336), (482, 44104), (592, 35909), (596, 35668), (964, 22052), (1192, 17834), (1928, 11026), (2384, 8917), (3856, 5513)]