20814640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:171

約数の個数: 160

約数和(自身を含む): 62853120

約数和(自身を除く): 42038480

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 31, 35, 40, 44, 55, 56, 62, 70, 77, 80, 88, 109, 110, 112, 124, 140, 154, 155, 176, 217, 218, 220, 248, 280, 308, 310, 341, 385, 434, 436, 440, 496, 545, 560, 616, 620, 682, 763, 770, 868, 872, 880, 1085, 1090, 1199, 1232, 1240, 1364, 1526, 1540, 1705, 1736, 1744, 2170, 2180, 2387, 2398, 2480, 2728, 3052, 3080, 3379, 3410, 3472, 3815, 4340, 4360, 4774, 4796, 5456, 5995, 6104, 6160, 6758, 6820, 7630, 8393, 8680, 8720, 9548, 9592, 11935, 11990, 12208, 13516, 13640, 15260, 16786, 16895, 17360, 19096, 19184, 23653, 23870, 23980, 27032, 27280, 30520, 33572, 33790, 37169, 38192, 41965, 47306, 47740, 47960, 54064, 61040, 67144, 67580, 74338, 83930, 94612, 95480, 95920, 118265, 134288, 135160, 148676, 167860, 185845, 189224, 190960, 236530, 260183, 270320, 297352, 335720, 371690, 378448, 473060, 520366, 594704, 671440, 743380, 946120, 1040732, 1300915, 1486760, 1892240, 2081464, 2601830, 2973520, 4162928, 5203660, 10407320, 20814640]

約数ペア:

[(1, 20814640), (2, 10407320), (4, 5203660), (5, 4162928), (7, 2973520), (8, 2601830), (10, 2081464), (11, 1892240), (14, 1486760), (16, 1300915), (20, 1040732), (22, 946120), (28, 743380), (31, 671440), (35, 594704), (40, 520366), (44, 473060), (55, 378448), (56, 371690), (62, 335720), (70, 297352), (77, 270320), (80, 260183), (88, 236530), (109, 190960), (110, 189224), (112, 185845), (124, 167860), (140, 148676), (154, 135160), (155, 134288), (176, 118265), (217, 95920), (218, 95480), (220, 94612), (248, 83930), (280, 74338), (308, 67580), (310, 67144), (341, 61040), (385, 54064), (434, 47960), (436, 47740), (440, 47306), (496, 41965), (545, 38192), (560, 37169), (616, 33790), (620, 33572), (682, 30520), (763, 27280), (770, 27032), (868, 23980), (872, 23870), (880, 23653), (1085, 19184), (1090, 19096), (1199, 17360), (1232, 16895), (1240, 16786), (1364, 15260), (1526, 13640), (1540, 13516), (1705, 12208), (1736, 11990), (1744, 11935), (2170, 9592), (2180, 9548), (2387, 8720), (2398, 8680), (2480, 8393), (2728, 7630), (3052, 6820), (3080, 6758), (3379, 6160), (3410, 6104), (3472, 5995), (3815, 5456), (4340, 4796), (4360, 4774)]