21403305

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:132

約数の個数: 128

約数和(自身を含む): 49766400

約数和(自身を除く): 28363095

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 27, 29, 33, 35, 45, 55, 63, 71, 77, 87, 99, 105, 135, 145, 165, 189, 203, 213, 231, 261, 297, 315, 319, 355, 385, 435, 495, 497, 609, 639, 693, 781, 783, 945, 957, 1015, 1065, 1155, 1305, 1485, 1491, 1595, 1827, 1917, 2059, 2079, 2233, 2343, 2485, 2871, 3045, 3195, 3465, 3905, 3915, 4473, 4785, 5467, 5481, 6177, 6699, 7029, 7455, 8613, 9135, 9585, 10295, 10395, 11165, 11715, 13419, 14355, 14413, 16401, 18531, 20097, 21087, 22365, 22649, 27335, 27405, 30885, 33495, 35145, 43065, 43239, 49203, 55593, 60291, 67095, 67947, 72065, 82005, 92655, 100485, 105435, 113245, 129717, 147609, 158543, 203841, 216195, 246015, 277965, 301455, 339735, 389151, 475629, 611523, 648585, 738045, 792715, 1019205, 1426887, 1945755, 2378145, 3057615, 4280661, 7134435, 21403305]

約数ペア:

[(1, 21403305), (3, 7134435), (5, 4280661), (7, 3057615), (9, 2378145), (11, 1945755), (15, 1426887), (21, 1019205), (27, 792715), (29, 738045), (33, 648585), (35, 611523), (45, 475629), (55, 389151), (63, 339735), (71, 301455), (77, 277965), (87, 246015), (99, 216195), (105, 203841), (135, 158543), (145, 147609), (165, 129717), (189, 113245), (203, 105435), (213, 100485), (231, 92655), (261, 82005), (297, 72065), (315, 67947), (319, 67095), (355, 60291), (385, 55593), (435, 49203), (495, 43239), (497, 43065), (609, 35145), (639, 33495), (693, 30885), (781, 27405), (783, 27335), (945, 22649), (957, 22365), (1015, 21087), (1065, 20097), (1155, 18531), (1305, 16401), (1485, 14413), (1491, 14355), (1595, 13419), (1827, 11715), (1917, 11165), (2059, 10395), (2079, 10295), (2233, 9585), (2343, 9135), (2485, 8613), (2871, 7455), (3045, 7029), (3195, 6699), (3465, 6177), (3905, 5481), (3915, 5467), (4473, 4785)]