20409376

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{691}}^1$

素因数の和:785

約数の個数: 48

約数和(自身を含む): 43944768

約数和(自身を除く): 23535392

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 71, 104, 142, 208, 284, 416, 568, 691, 923, 1136, 1382, 1846, 2272, 2764, 3692, 5528, 7384, 8983, 11056, 14768, 17966, 22112, 29536, 35932, 49061, 71864, 98122, 143728, 196244, 287456, 392488, 637793, 784976, 1275586, 1569952, 2551172, 5102344, 10204688, 20409376]

約数ペア:

[(1, 20409376), (2, 10204688), (4, 5102344), (8, 2551172), (13, 1569952), (16, 1275586), (26, 784976), (32, 637793), (52, 392488), (71, 287456), (104, 196244), (142, 143728), (208, 98122), (284, 71864), (416, 49061), (568, 35932), (691, 29536), (923, 22112), (1136, 17966), (1382, 14768), (1846, 11056), (2272, 8983), (2764, 7384), (3692, 5528)]