21425425

素因数分解:

$5^2\times 7^1\times {\mathrm{191}}^1\times {\mathrm{641}}^1$

素因数の和:849

約数の個数: 24

約数和(自身を含む): 30569472

約数和(自身を除く): 9144047

約数列:

[1, 5, 7, 25, 35, 175, 191, 641, 955, 1337, 3205, 4487, 4775, 6685, 16025, 22435, 33425, 112175, 122431, 612155, 857017, 3060775, 4285085, 21425425]

約数ペア:

[(1, 21425425), (5, 4285085), (7, 3060775), (25, 857017), (35, 612155), (175, 122431), (191, 112175), (641, 33425), (955, 22435), (1337, 16025), (3205, 6685), (4487, 4775)]