21312496

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{257}}^1$

素因数の和:409

約数の個数: 40

約数和(自身を含む): 42613344

約数和(自身を除く): 21300848

約数列:

[1, 2, 4, 8, 16, 71, 73, 142, 146, 257, 284, 292, 514, 568, 584, 1028, 1136, 1168, 2056, 4112, 5183, 10366, 18247, 18761, 20732, 36494, 37522, 41464, 72988, 75044, 82928, 145976, 150088, 291952, 300176, 1332031, 2664062, 5328124, 10656248, 21312496]

約数ペア:

[(1, 21312496), (2, 10656248), (4, 5328124), (8, 2664062), (16, 1332031), (71, 300176), (73, 291952), (142, 150088), (146, 145976), (257, 82928), (284, 75044), (292, 72988), (514, 41464), (568, 37522), (584, 36494), (1028, 20732), (1136, 18761), (1168, 18247), (2056, 10366), (4112, 5183)]