21305988

素因数分解:

$2^2\times 3^2\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{311}}^1$

素因数の和:505

約数の個数: 72

約数和(自身を含む): 59282496

約数和(自身を除く): 37976508

約数列:

[1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 132, 173, 198, 311, 346, 396, 519, 622, 692, 933, 1038, 1244, 1557, 1866, 1903, 2076, 2799, 3114, 3421, 3732, 3806, 5598, 5709, 6228, 6842, 7612, 10263, 11196, 11418, 13684, 17127, 20526, 22836, 30789, 34254, 41052, 53803, 61578, 68508, 107606, 123156, 161409, 215212, 322818, 484227, 591833, 645636, 968454, 1183666, 1775499, 1936908, 2367332, 3550998, 5326497, 7101996, 10652994, 21305988]

約数ペア:

[(1, 21305988), (2, 10652994), (3, 7101996), (4, 5326497), (6, 3550998), (9, 2367332), (11, 1936908), (12, 1775499), (18, 1183666), (22, 968454), (33, 645636), (36, 591833), (44, 484227), (66, 322818), (99, 215212), (132, 161409), (173, 123156), (198, 107606), (311, 68508), (346, 61578), (396, 53803), (519, 41052), (622, 34254), (692, 30789), (933, 22836), (1038, 20526), (1244, 17127), (1557, 13684), (1866, 11418), (1903, 11196), (2076, 10263), (2799, 7612), (3114, 6842), (3421, 6228), (3732, 5709), (3806, 5598)]