20996428

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{41}}^1\times {\mathrm{443}}^1$

素因数の和:522

約数の個数: 36

約数和(自身を含む): 40074552

約数和(自身を除く): 19078124

約数列:

[1, 2, 4, 17, 34, 41, 68, 82, 164, 289, 443, 578, 697, 886, 1156, 1394, 1772, 2788, 7531, 11849, 15062, 18163, 23698, 30124, 36326, 47396, 72652, 128027, 256054, 308771, 512108, 617542, 1235084, 5249107, 10498214, 20996428]

約数ペア:

[(1, 20996428), (2, 10498214), (4, 5249107), (17, 1235084), (34, 617542), (41, 512108), (68, 308771), (82, 256054), (164, 128027), (289, 72652), (443, 47396), (578, 36326), (697, 30124), (886, 23698), (1156, 18163), (1394, 15062), (1772, 11849), (2788, 7531)]