21504890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{1427}}^1$

素因数の和:1582

約数の個数: 32

約数和(自身を含む): 42565824

約数和(自身を除く): 21060934

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 137, 274, 685, 1370, 1427, 1507, 2854, 3014, 7135, 7535, 14270, 15070, 15697, 31394, 78485, 156970, 195499, 390998, 977495, 1954990, 2150489, 4300978, 10752445, 21504890]

約数ペア:

[(1, 21504890), (2, 10752445), (5, 4300978), (10, 2150489), (11, 1954990), (22, 977495), (55, 390998), (110, 195499), (137, 156970), (274, 78485), (685, 31394), (1370, 15697), (1427, 15070), (1507, 14270), (2854, 7535), (3014, 7135)]