21206955

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:137

約数の個数: 96

約数和(自身を含む): 44782848

約数和(自身を除く): 23575893

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 43, 49, 55, 61, 77, 105, 129, 147, 165, 183, 215, 231, 245, 301, 305, 385, 427, 473, 539, 645, 671, 735, 903, 915, 1155, 1281, 1419, 1505, 1617, 2013, 2107, 2135, 2365, 2623, 2695, 2989, 3311, 3355, 4515, 4697, 6321, 6405, 7095, 7869, 8085, 8967, 9933, 10065, 10535, 13115, 14091, 14945, 16555, 18361, 23177, 23485, 28853, 31605, 32879, 39345, 44835, 49665, 55083, 69531, 70455, 86559, 91805, 98637, 115885, 128527, 144265, 164395, 201971, 275415, 347655, 385581, 432795, 493185, 605913, 642635, 1009855, 1413797, 1927905, 3029565, 4241391, 7068985, 21206955]

約数ペア:

[(1, 21206955), (3, 7068985), (5, 4241391), (7, 3029565), (11, 1927905), (15, 1413797), (21, 1009855), (33, 642635), (35, 605913), (43, 493185), (49, 432795), (55, 385581), (61, 347655), (77, 275415), (105, 201971), (129, 164395), (147, 144265), (165, 128527), (183, 115885), (215, 98637), (231, 91805), (245, 86559), (301, 70455), (305, 69531), (385, 55083), (427, 49665), (473, 44835), (539, 39345), (645, 32879), (671, 31605), (735, 28853), (903, 23485), (915, 23177), (1155, 18361), (1281, 16555), (1419, 14945), (1505, 14091), (1617, 13115), (2013, 10535), (2107, 10065), (2135, 9933), (2365, 8967), (2623, 8085), (2695, 7869), (2989, 7095), (3311, 6405), (3355, 6321), (4515, 4697)]