21158852

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{521}}^1$

素因数の和:620

約数の個数: 48

約数和(自身を含む): 44198784

約数和(自身を除く): 23039932

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 71, 142, 143, 284, 286, 521, 572, 781, 923, 1042, 1562, 1846, 2084, 3124, 3692, 5731, 6773, 10153, 11462, 13546, 20306, 22924, 27092, 36991, 40612, 73982, 74503, 147964, 149006, 298012, 406901, 480883, 813802, 961766, 1627604, 1923532, 5289713, 10579426, 21158852]

約数ペア:

[(1, 21158852), (2, 10579426), (4, 5289713), (11, 1923532), (13, 1627604), (22, 961766), (26, 813802), (44, 480883), (52, 406901), (71, 298012), (142, 149006), (143, 147964), (284, 74503), (286, 73982), (521, 40612), (572, 36991), (781, 27092), (923, 22924), (1042, 20306), (1562, 13546), (1846, 11462), (2084, 10153), (3124, 6773), (3692, 5731)]