21649775

素因数分解:

$5^2\times 7^1\times {\mathrm{193}}^1\times {\mathrm{641}}^1$

素因数の和:851

約数の個数: 24

約数和(自身を含む): 30887904

約数和(自身を除く): 9238129

約数列:

[1, 5, 7, 25, 35, 175, 193, 641, 965, 1351, 3205, 4487, 4825, 6755, 16025, 22435, 33775, 112175, 123713, 618565, 865991, 3092825, 4329955, 21649775]

約数ペア:

[(1, 21649775), (5, 4329955), (7, 3092825), (25, 865991), (35, 618565), (175, 123713), (193, 112175), (641, 33775), (965, 22435), (1351, 16025), (3205, 6755), (4487, 4825)]