19765515

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:292

約数の個数: 64

約数和(自身を含む): 40043520

約数和(自身を除く): 20278005

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 109, 157, 165, 231, 327, 385, 471, 545, 763, 785, 1099, 1155, 1199, 1635, 1727, 2289, 2355, 3297, 3597, 3815, 5181, 5495, 5995, 8393, 8635, 11445, 12089, 16485, 17113, 17985, 25179, 25905, 36267, 41965, 51339, 60445, 85565, 119791, 125895, 181335, 188243, 256695, 359373, 564729, 598955, 941215, 1317701, 1796865, 2823645, 3953103, 6588505, 19765515]

約数ペア:

[(1, 19765515), (3, 6588505), (5, 3953103), (7, 2823645), (11, 1796865), (15, 1317701), (21, 941215), (33, 598955), (35, 564729), (55, 359373), (77, 256695), (105, 188243), (109, 181335), (157, 125895), (165, 119791), (231, 85565), (327, 60445), (385, 51339), (471, 41965), (545, 36267), (763, 25905), (785, 25179), (1099, 17985), (1155, 17113), (1199, 16485), (1635, 12089), (1727, 11445), (2289, 8635), (2355, 8393), (3297, 5995), (3597, 5495), (3815, 5181)]