21004214

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:221

約数の個数: 64

約数和(自身を含む): 42550272

約数和(自身を除く): 21546058

約数列:

[1, 2, 7, 11, 14, 17, 22, 34, 71, 77, 113, 119, 142, 154, 187, 226, 238, 374, 497, 781, 791, 994, 1207, 1243, 1309, 1562, 1582, 1921, 2414, 2486, 2618, 3842, 5467, 8023, 8449, 8701, 10934, 13277, 13447, 16046, 16898, 17402, 21131, 26554, 26894, 42262, 56161, 88253, 92939, 112322, 136391, 147917, 176506, 185878, 272782, 295834, 617771, 954737, 1235542, 1500301, 1909474, 3000602, 10502107, 21004214]

約数ペア:

[(1, 21004214), (2, 10502107), (7, 3000602), (11, 1909474), (14, 1500301), (17, 1235542), (22, 954737), (34, 617771), (71, 295834), (77, 272782), (113, 185878), (119, 176506), (142, 147917), (154, 136391), (187, 112322), (226, 92939), (238, 88253), (374, 56161), (497, 42262), (781, 26894), (791, 26554), (994, 21131), (1207, 17402), (1243, 16898), (1309, 16046), (1562, 13447), (1582, 13277), (1921, 10934), (2414, 8701), (2486, 8449), (2618, 8023), (3842, 5467)]