21015904

素因数分解:

$2^5\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1031}}^1$

素因数の和:1068

約数の個数: 72

約数和(自身を含む): 51882768

約数和(自身を除く): 30866864

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 49, 52, 56, 91, 98, 104, 112, 182, 196, 208, 224, 364, 392, 416, 637, 728, 784, 1031, 1274, 1456, 1568, 2062, 2548, 2912, 4124, 5096, 7217, 8248, 10192, 13403, 14434, 16496, 20384, 26806, 28868, 32992, 50519, 53612, 57736, 93821, 101038, 107224, 115472, 187642, 202076, 214448, 230944, 375284, 404152, 428896, 656747, 750568, 808304, 1313494, 1501136, 1616608, 2626988, 3002272, 5253976, 10507952, 21015904]

約数ペア:

[(1, 21015904), (2, 10507952), (4, 5253976), (7, 3002272), (8, 2626988), (13, 1616608), (14, 1501136), (16, 1313494), (26, 808304), (28, 750568), (32, 656747), (49, 428896), (52, 404152), (56, 375284), (91, 230944), (98, 214448), (104, 202076), (112, 187642), (182, 115472), (196, 107224), (208, 101038), (224, 93821), (364, 57736), (392, 53612), (416, 50519), (637, 32992), (728, 28868), (784, 26806), (1031, 20384), (1274, 16496), (1456, 14434), (1568, 13403), (2062, 10192), (2548, 8248), (2912, 7217), (4124, 5096)]