21979760

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{24977}}^1$

素因数の和:25001

約数の個数: 40

約数和(自身を含む): 55750896

約数和(自身を除く): 33771136

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 24977, 49954, 99908, 124885, 199816, 249770, 274747, 399632, 499540, 549494, 999080, 1098988, 1373735, 1998160, 2197976, 2747470, 4395952, 5494940, 10989880, 21979760]

約数ペア:

[(1, 21979760), (2, 10989880), (4, 5494940), (5, 4395952), (8, 2747470), (10, 2197976), (11, 1998160), (16, 1373735), (20, 1098988), (22, 999080), (40, 549494), (44, 499540), (55, 399632), (80, 274747), (88, 249770), (110, 199816), (176, 124885), (220, 99908), (440, 49954), (880, 24977)]