21106778

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{101}}^1$

素因数の和:203

約数の個数: 64

約数和(自身を含む): 42301440

約数和(自身を除く): 21194662

約数列:

[1, 2, 7, 11, 14, 22, 23, 46, 59, 77, 101, 118, 154, 161, 202, 253, 322, 413, 506, 649, 707, 826, 1111, 1298, 1357, 1414, 1771, 2222, 2323, 2714, 3542, 4543, 4646, 5959, 7777, 9086, 9499, 11918, 14927, 15554, 16261, 18998, 25553, 29854, 32522, 41713, 51106, 65549, 83426, 104489, 131098, 137057, 178871, 208978, 274114, 357742, 458843, 917686, 959399, 1507627, 1918798, 3015254, 10553389, 21106778]

約数ペア:

[(1, 21106778), (2, 10553389), (7, 3015254), (11, 1918798), (14, 1507627), (22, 959399), (23, 917686), (46, 458843), (59, 357742), (77, 274114), (101, 208978), (118, 178871), (154, 137057), (161, 131098), (202, 104489), (253, 83426), (322, 65549), (413, 51106), (506, 41713), (649, 32522), (707, 29854), (826, 25553), (1111, 18998), (1298, 16261), (1357, 15554), (1414, 14927), (1771, 11918), (2222, 9499), (2323, 9086), (2714, 7777), (3542, 5959), (4543, 4646)]