19924580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{389}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 45405360

約数和(自身を除く): 25480780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 197, 260, 389, 394, 778, 788, 985, 1556, 1945, 1970, 2561, 3890, 3940, 5057, 5122, 7780, 10114, 10244, 12805, 20228, 25285, 25610, 50570, 51220, 76633, 101140, 153266, 306532, 383165, 766330, 996229, 1532660, 1992458, 3984916, 4981145, 9962290, 19924580]

約数ペア:

[(1, 19924580), (2, 9962290), (4, 4981145), (5, 3984916), (10, 1992458), (13, 1532660), (20, 996229), (26, 766330), (52, 383165), (65, 306532), (130, 153266), (197, 101140), (260, 76633), (389, 51220), (394, 50570), (778, 25610), (788, 25285), (985, 20228), (1556, 12805), (1945, 10244), (1970, 10114), (2561, 7780), (3890, 5122), (3940, 5057)]