21221252

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{457}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 43088640

約数和(自身を除く): 21867388

約数列:

[1, 2, 4, 13, 19, 26, 38, 47, 52, 76, 94, 188, 247, 457, 494, 611, 893, 914, 988, 1222, 1786, 1828, 2444, 3572, 5941, 8683, 11609, 11882, 17366, 21479, 23218, 23764, 34732, 42958, 46436, 85916, 112879, 225758, 279227, 408101, 451516, 558454, 816202, 1116908, 1632404, 5305313, 10610626, 21221252]

約数ペア:

[(1, 21221252), (2, 10610626), (4, 5305313), (13, 1632404), (19, 1116908), (26, 816202), (38, 558454), (47, 451516), (52, 408101), (76, 279227), (94, 225758), (188, 112879), (247, 85916), (457, 46436), (494, 42958), (611, 34732), (893, 23764), (914, 23218), (988, 21479), (1222, 17366), (1786, 11882), (1828, 11609), (2444, 8683), (3572, 5941)]