21309372

素因数分解:

$2^2\times 3^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{397}}^1$

素因数の和:488

約数の個数: 96

約数和(自身を含む): 64189440

約数和(自身を除く): 42880068

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 63, 71, 84, 108, 126, 142, 189, 213, 252, 284, 378, 397, 426, 497, 639, 756, 794, 852, 994, 1191, 1278, 1491, 1588, 1917, 1988, 2382, 2556, 2779, 2982, 3573, 3834, 4473, 4764, 5558, 5964, 7146, 7668, 8337, 8946, 10719, 11116, 13419, 14292, 16674, 17892, 21438, 25011, 26838, 28187, 33348, 42876, 50022, 53676, 56374, 75033, 84561, 100044, 112748, 150066, 169122, 197309, 253683, 300132, 338244, 394618, 507366, 591927, 761049, 789236, 1014732, 1183854, 1522098, 1775781, 2367708, 3044196, 3551562, 5327343, 7103124, 10654686, 21309372]

約数ペア:

[(1, 21309372), (2, 10654686), (3, 7103124), (4, 5327343), (6, 3551562), (7, 3044196), (9, 2367708), (12, 1775781), (14, 1522098), (18, 1183854), (21, 1014732), (27, 789236), (28, 761049), (36, 591927), (42, 507366), (54, 394618), (63, 338244), (71, 300132), (84, 253683), (108, 197309), (126, 169122), (142, 150066), (189, 112748), (213, 100044), (252, 84561), (284, 75033), (378, 56374), (397, 53676), (426, 50022), (497, 42876), (639, 33348), (756, 28187), (794, 26838), (852, 25011), (994, 21438), (1191, 17892), (1278, 16674), (1491, 14292), (1588, 13419), (1917, 11116), (1988, 10719), (2382, 8946), (2556, 8337), (2779, 7668), (2982, 7146), (3573, 5964), (3834, 5558), (4473, 4764)]