21989396

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1039}}^1$

素因数の和:1104

約数の個数: 48

約数和(自身を含む): 46475520

約数和(自身を除く): 24486124

約数列:

[1, 2, 4, 11, 13, 22, 26, 37, 44, 52, 74, 143, 148, 286, 407, 481, 572, 814, 962, 1039, 1628, 1924, 2078, 4156, 5291, 10582, 11429, 13507, 21164, 22858, 27014, 38443, 45716, 54028, 76886, 148577, 153772, 297154, 422873, 499759, 594308, 845746, 999518, 1691492, 1999036, 5497349, 10994698, 21989396]

約数ペア:

[(1, 21989396), (2, 10994698), (4, 5497349), (11, 1999036), (13, 1691492), (22, 999518), (26, 845746), (37, 594308), (44, 499759), (52, 422873), (74, 297154), (143, 153772), (148, 148577), (286, 76886), (407, 54028), (481, 45716), (572, 38443), (814, 27014), (962, 22858), (1039, 21164), (1628, 13507), (1924, 11429), (2078, 10582), (4156, 5291)]