19965200

素因数分解:

$2^4\times 5^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:145

約数の個数: 120

約数和(自身を含む): 52585920

約数和(自身を除く): 32620720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 37, 38, 40, 50, 71, 74, 76, 80, 95, 100, 142, 148, 152, 185, 190, 200, 284, 296, 304, 355, 370, 380, 400, 475, 568, 592, 703, 710, 740, 760, 925, 950, 1136, 1349, 1406, 1420, 1480, 1520, 1775, 1850, 1900, 2627, 2698, 2812, 2840, 2960, 3515, 3550, 3700, 3800, 5254, 5396, 5624, 5680, 6745, 7030, 7100, 7400, 7600, 10508, 10792, 11248, 13135, 13490, 14060, 14200, 14800, 17575, 21016, 21584, 26270, 26980, 28120, 28400, 33725, 35150, 42032, 49913, 52540, 53960, 56240, 65675, 67450, 70300, 99826, 105080, 107920, 131350, 134900, 140600, 199652, 210160, 249565, 262700, 269800, 281200, 399304, 499130, 525400, 539600, 798608, 998260, 1050800, 1247825, 1996520, 2495650, 3993040, 4991300, 9982600, 19965200]

約数ペア:

[(1, 19965200), (2, 9982600), (4, 4991300), (5, 3993040), (8, 2495650), (10, 1996520), (16, 1247825), (19, 1050800), (20, 998260), (25, 798608), (37, 539600), (38, 525400), (40, 499130), (50, 399304), (71, 281200), (74, 269800), (76, 262700), (80, 249565), (95, 210160), (100, 199652), (142, 140600), (148, 134900), (152, 131350), (185, 107920), (190, 105080), (200, 99826), (284, 70300), (296, 67450), (304, 65675), (355, 56240), (370, 53960), (380, 52540), (400, 49913), (475, 42032), (568, 35150), (592, 33725), (703, 28400), (710, 28120), (740, 26980), (760, 26270), (925, 21584), (950, 21016), (1136, 17575), (1349, 14800), (1406, 14200), (1420, 14060), (1480, 13490), (1520, 13135), (1775, 11248), (1850, 10792), (1900, 10508), (2627, 7600), (2698, 7400), (2812, 7100), (2840, 7030), (2960, 6745), (3515, 5680), (3550, 5624), (3700, 5396), (3800, 5254)]