21278334

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:166

約数の個数: 96

約数和(自身を含む): 55157760

約数和(自身を除く): 33879426

約数列:

[1, 2, 3, 6, 7, 11, 14, 21, 22, 33, 42, 53, 66, 77, 79, 106, 121, 154, 158, 159, 231, 237, 242, 318, 363, 371, 462, 474, 553, 583, 726, 742, 847, 869, 1106, 1113, 1166, 1659, 1694, 1738, 1749, 2226, 2541, 2607, 3318, 3498, 4081, 4187, 5082, 5214, 6083, 6413, 8162, 8374, 9559, 12166, 12243, 12561, 12826, 18249, 19118, 19239, 24486, 25122, 28677, 29309, 36498, 38478, 44891, 46057, 57354, 58618, 66913, 87927, 89782, 92114, 133826, 134673, 138171, 175854, 200739, 269346, 276342, 322399, 401478, 506627, 644798, 967197, 1013254, 1519881, 1934394, 3039762, 3546389, 7092778, 10639167, 21278334]

約数ペア:

[(1, 21278334), (2, 10639167), (3, 7092778), (6, 3546389), (7, 3039762), (11, 1934394), (14, 1519881), (21, 1013254), (22, 967197), (33, 644798), (42, 506627), (53, 401478), (66, 322399), (77, 276342), (79, 269346), (106, 200739), (121, 175854), (154, 138171), (158, 134673), (159, 133826), (231, 92114), (237, 89782), (242, 87927), (318, 66913), (363, 58618), (371, 57354), (462, 46057), (474, 44891), (553, 38478), (583, 36498), (726, 29309), (742, 28677), (847, 25122), (869, 24486), (1106, 19239), (1113, 19118), (1166, 18249), (1659, 12826), (1694, 12561), (1738, 12243), (1749, 12166), (2226, 9559), (2541, 8374), (2607, 8162), (3318, 6413), (3498, 6083), (4081, 5214), (4187, 5082)]