21721076

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{3049}}^1$

素因数の和:3203

約数の個数: 24

約数和(自身を含む): 41248200

約数和(自身を除く): 19527124

約数列:

[1, 2, 4, 13, 26, 52, 137, 274, 548, 1781, 3049, 3562, 6098, 7124, 12196, 39637, 79274, 158548, 417713, 835426, 1670852, 5430269, 10860538, 21721076]

約数ペア:

[(1, 21721076), (2, 10860538), (4, 5430269), (13, 1670852), (26, 835426), (52, 417713), (137, 158548), (274, 79274), (548, 39637), (1781, 12196), (3049, 7124), (3562, 6098)]