20981504

素因数分解:

$2^8\times {\mathrm{41}}^1\times {\mathrm{1999}}^1$

素因数の和:2056

約数の個数: 36

約数和(自身を含む): 42924000

約数和(自身を除く): 21942496

約数列:

[1, 2, 4, 8, 16, 32, 41, 64, 82, 128, 164, 256, 328, 656, 1312, 1999, 2624, 3998, 5248, 7996, 10496, 15992, 31984, 63968, 81959, 127936, 163918, 255872, 327836, 511744, 655672, 1311344, 2622688, 5245376, 10490752, 20981504]

約数ペア:

[(1, 20981504), (2, 10490752), (4, 5245376), (8, 2622688), (16, 1311344), (32, 655672), (41, 511744), (64, 327836), (82, 255872), (128, 163918), (164, 127936), (256, 81959), (328, 63968), (656, 31984), (1312, 15992), (1999, 10496), (2624, 7996), (3998, 5248)]