19711540

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1\times {\mathrm{151}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 42747264

約数和(自身を除く): 23035724

約数列:

[1, 2, 4, 5, 10, 20, 61, 107, 122, 151, 214, 244, 302, 305, 428, 535, 604, 610, 755, 1070, 1220, 1510, 2140, 3020, 6527, 9211, 13054, 16157, 18422, 26108, 32314, 32635, 36844, 46055, 64628, 65270, 80785, 92110, 130540, 161570, 184220, 323140, 985577, 1971154, 3942308, 4927885, 9855770, 19711540]

約数ペア:

[(1, 19711540), (2, 9855770), (4, 4927885), (5, 3942308), (10, 1971154), (20, 985577), (61, 323140), (107, 184220), (122, 161570), (151, 130540), (214, 92110), (244, 80785), (302, 65270), (305, 64628), (428, 46055), (535, 36844), (604, 32635), (610, 32314), (755, 26108), (1070, 18422), (1220, 16157), (1510, 13054), (2140, 9211), (3020, 6527)]