21179648

素因数分解:

$2^8\times 7^1\times {\mathrm{53}}^1\times {\mathrm{223}}^1$

素因数の和:299

約数の個数: 72

約数和(自身を含む): 49448448

約数和(自身を除く): 28268800

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 53, 56, 64, 106, 112, 128, 212, 223, 224, 256, 371, 424, 446, 448, 742, 848, 892, 896, 1484, 1561, 1696, 1784, 1792, 2968, 3122, 3392, 3568, 5936, 6244, 6784, 7136, 11819, 11872, 12488, 13568, 14272, 23638, 23744, 24976, 28544, 47276, 47488, 49952, 57088, 82733, 94552, 94976, 99904, 165466, 189104, 199808, 330932, 378208, 399616, 661864, 756416, 1323728, 1512832, 2647456, 3025664, 5294912, 10589824, 21179648]

約数ペア:

[(1, 21179648), (2, 10589824), (4, 5294912), (7, 3025664), (8, 2647456), (14, 1512832), (16, 1323728), (28, 756416), (32, 661864), (53, 399616), (56, 378208), (64, 330932), (106, 199808), (112, 189104), (128, 165466), (212, 99904), (223, 94976), (224, 94552), (256, 82733), (371, 57088), (424, 49952), (446, 47488), (448, 47276), (742, 28544), (848, 24976), (892, 23744), (896, 23638), (1484, 14272), (1561, 13568), (1696, 12488), (1784, 11872), (1792, 11819), (2968, 7136), (3122, 6784), (3392, 6244), (3568, 5936)]