21186776

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{1487}}^1$

素因数の和:1643

約数の個数: 32

約数和(自身を含む): 43122240

約数和(自身を除く): 21935464

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 137, 274, 548, 1096, 1487, 1781, 2974, 3562, 5948, 7124, 11896, 14248, 19331, 38662, 77324, 154648, 203719, 407438, 814876, 1629752, 2648347, 5296694, 10593388, 21186776]

約数ペア:

[(1, 21186776), (2, 10593388), (4, 5296694), (8, 2648347), (13, 1629752), (26, 814876), (52, 407438), (104, 203719), (137, 154648), (274, 77324), (548, 38662), (1096, 19331), (1487, 14248), (1781, 11896), (2974, 7124), (3562, 5948)]