20323520

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:278

約数の個数: 112

約数和(自身を含む): 56863488

約数和(自身を除く): 36539968

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 43, 56, 64, 70, 80, 86, 112, 140, 160, 172, 211, 215, 224, 280, 301, 320, 344, 422, 430, 448, 560, 602, 688, 844, 860, 1055, 1120, 1204, 1376, 1477, 1505, 1688, 1720, 2110, 2240, 2408, 2752, 2954, 3010, 3376, 3440, 4220, 4816, 5908, 6020, 6752, 6880, 7385, 8440, 9073, 9632, 11816, 12040, 13504, 13760, 14770, 16880, 18146, 19264, 23632, 24080, 29540, 33760, 36292, 45365, 47264, 48160, 59080, 63511, 67520, 72584, 90730, 94528, 96320, 118160, 127022, 145168, 181460, 236320, 254044, 290336, 317555, 362920, 472640, 508088, 580672, 635110, 725840, 1016176, 1270220, 1451680, 2032352, 2540440, 2903360, 4064704, 5080880, 10161760, 20323520]

約数ペア:

[(1, 20323520), (2, 10161760), (4, 5080880), (5, 4064704), (7, 2903360), (8, 2540440), (10, 2032352), (14, 1451680), (16, 1270220), (20, 1016176), (28, 725840), (32, 635110), (35, 580672), (40, 508088), (43, 472640), (56, 362920), (64, 317555), (70, 290336), (80, 254044), (86, 236320), (112, 181460), (140, 145168), (160, 127022), (172, 118160), (211, 96320), (215, 94528), (224, 90730), (280, 72584), (301, 67520), (320, 63511), (344, 59080), (422, 48160), (430, 47264), (448, 45365), (560, 36292), (602, 33760), (688, 29540), (844, 24080), (860, 23632), (1055, 19264), (1120, 18146), (1204, 16880), (1376, 14770), (1477, 13760), (1505, 13504), (1688, 12040), (1720, 11816), (2110, 9632), (2240, 9073), (2408, 8440), (2752, 7385), (2954, 6880), (3010, 6752), (3376, 6020), (3440, 5908), (4220, 4816)]