21221872

素因数分解:

$2^4\times 7^1\times {\mathrm{89}}^1\times {\mathrm{2129}}^1$

素因数の和:2233

約数の個数: 40

約数和(自身を含む): 47541600

約数和(自身を除く): 26319728

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 89, 112, 178, 356, 623, 712, 1246, 1424, 2129, 2492, 4258, 4984, 8516, 9968, 14903, 17032, 29806, 34064, 59612, 119224, 189481, 238448, 378962, 757924, 1326367, 1515848, 2652734, 3031696, 5305468, 10610936, 21221872]

約数ペア:

[(1, 21221872), (2, 10610936), (4, 5305468), (7, 3031696), (8, 2652734), (14, 1515848), (16, 1326367), (28, 757924), (56, 378962), (89, 238448), (112, 189481), (178, 119224), (356, 59612), (623, 34064), (712, 29806), (1246, 17032), (1424, 14903), (2129, 9968), (2492, 8516), (4258, 4984)]