18739903

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:144

約数の個数: 36

約数和(自身を含む): 24700608

約数和(自身を除く): 5960705

約数列:

[1, 7, 13, 31, 49, 73, 91, 169, 217, 403, 511, 637, 949, 1183, 1519, 2263, 2821, 3577, 5239, 6643, 8281, 12337, 15841, 19747, 29419, 36673, 46501, 86359, 110887, 205933, 256711, 382447, 604513, 1441531, 2677129, 18739903]

約数ペア:

[(1, 18739903), (7, 2677129), (13, 1441531), (31, 604513), (49, 382447), (73, 256711), (91, 205933), (169, 110887), (217, 86359), (403, 46501), (511, 36673), (637, 29419), (949, 19747), (1183, 15841), (1519, 12337), (2263, 8281), (2821, 6643), (3577, 5239)]