21280804

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{41}}^1\times {\mathrm{449}}^1$

素因数の和:528

約数の個数: 36

約数和(自身を含む): 40616100

約数和(自身を除く): 19335296

約数列:

[1, 2, 4, 17, 34, 41, 68, 82, 164, 289, 449, 578, 697, 898, 1156, 1394, 1796, 2788, 7633, 11849, 15266, 18409, 23698, 30532, 36818, 47396, 73636, 129761, 259522, 312953, 519044, 625906, 1251812, 5320201, 10640402, 21280804]

約数ペア:

[(1, 21280804), (2, 10640402), (4, 5320201), (17, 1251812), (34, 625906), (41, 519044), (68, 312953), (82, 259522), (164, 129761), (289, 73636), (449, 47396), (578, 36818), (697, 30532), (898, 23698), (1156, 18409), (1394, 15266), (1796, 11849), (2788, 7633)]