20304760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{571}}^1$

素因数の和:716

約数の個数: 64

約数和(自身を含む): 52715520

約数和(自身を除く): 32410760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 127, 140, 254, 280, 508, 571, 635, 889, 1016, 1142, 1270, 1778, 2284, 2540, 2855, 3556, 3997, 4445, 4568, 5080, 5710, 7112, 7994, 8890, 11420, 15988, 17780, 19985, 22840, 31976, 35560, 39970, 72517, 79940, 145034, 159880, 290068, 362585, 507619, 580136, 725170, 1015238, 1450340, 2030476, 2538095, 2900680, 4060952, 5076190, 10152380, 20304760]

約数ペア:

[(1, 20304760), (2, 10152380), (4, 5076190), (5, 4060952), (7, 2900680), (8, 2538095), (10, 2030476), (14, 1450340), (20, 1015238), (28, 725170), (35, 580136), (40, 507619), (56, 362585), (70, 290068), (127, 159880), (140, 145034), (254, 79940), (280, 72517), (508, 39970), (571, 35560), (635, 31976), (889, 22840), (1016, 19985), (1142, 17780), (1270, 15988), (1778, 11420), (2284, 8890), (2540, 7994), (2855, 7112), (3556, 5710), (3997, 5080), (4445, 4568)]