20912920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3931}}^1$

素因数の和:3968

約数の個数: 64

約数和(自身を含む): 56620800

約数和(自身を除く): 35707880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 3931, 5320, 7862, 15724, 19655, 27517, 31448, 39310, 55034, 74689, 78620, 110068, 137585, 149378, 157240, 220136, 275170, 298756, 373445, 522823, 550340, 597512, 746890, 1045646, 1100680, 1493780, 2091292, 2614115, 2987560, 4182584, 5228230, 10456460, 20912920]

約数ペア:

[(1, 20912920), (2, 10456460), (4, 5228230), (5, 4182584), (7, 2987560), (8, 2614115), (10, 2091292), (14, 1493780), (19, 1100680), (20, 1045646), (28, 746890), (35, 597512), (38, 550340), (40, 522823), (56, 373445), (70, 298756), (76, 275170), (95, 220136), (133, 157240), (140, 149378), (152, 137585), (190, 110068), (266, 78620), (280, 74689), (380, 55034), (532, 39310), (665, 31448), (760, 27517), (1064, 19655), (1330, 15724), (2660, 7862), (3931, 5320)]