20976725

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{641}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 34390656

約数和(自身を除く): 13413931

約数列:

[1, 5, 7, 11, 17, 25, 35, 55, 77, 85, 119, 175, 187, 275, 385, 425, 595, 641, 935, 1309, 1925, 2975, 3205, 4487, 4675, 6545, 7051, 10897, 16025, 22435, 32725, 35255, 49357, 54485, 76279, 112175, 119867, 176275, 246785, 272425, 381395, 599335, 839069, 1233925, 1906975, 2996675, 4195345, 20976725]

約数ペア:

[(1, 20976725), (5, 4195345), (7, 2996675), (11, 1906975), (17, 1233925), (25, 839069), (35, 599335), (55, 381395), (77, 272425), (85, 246785), (119, 176275), (175, 119867), (187, 112175), (275, 76279), (385, 54485), (425, 49357), (595, 35255), (641, 32725), (935, 22435), (1309, 16025), (1925, 10897), (2975, 7051), (3205, 6545), (4487, 4675)]