20839520

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{233}}^1$

素因数の和:304

約数の個数: 96

約数和(自身を含む): 54486432

約数和(自身を除く): 33646912

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 43, 52, 65, 80, 86, 104, 130, 160, 172, 208, 215, 233, 260, 344, 416, 430, 466, 520, 559, 688, 860, 932, 1040, 1118, 1165, 1376, 1720, 1864, 2080, 2236, 2330, 2795, 3029, 3440, 3728, 4472, 4660, 5590, 6058, 6880, 7456, 8944, 9320, 10019, 11180, 12116, 15145, 17888, 18640, 20038, 22360, 24232, 30290, 37280, 40076, 44720, 48464, 50095, 60580, 80152, 89440, 96928, 100190, 121160, 130247, 160304, 200380, 242320, 260494, 320608, 400760, 484640, 520988, 651235, 801520, 1041976, 1302470, 1603040, 2083952, 2604940, 4167904, 5209880, 10419760, 20839520]

約数ペア:

[(1, 20839520), (2, 10419760), (4, 5209880), (5, 4167904), (8, 2604940), (10, 2083952), (13, 1603040), (16, 1302470), (20, 1041976), (26, 801520), (32, 651235), (40, 520988), (43, 484640), (52, 400760), (65, 320608), (80, 260494), (86, 242320), (104, 200380), (130, 160304), (160, 130247), (172, 121160), (208, 100190), (215, 96928), (233, 89440), (260, 80152), (344, 60580), (416, 50095), (430, 48464), (466, 44720), (520, 40076), (559, 37280), (688, 30290), (860, 24232), (932, 22360), (1040, 20038), (1118, 18640), (1165, 17888), (1376, 15145), (1720, 12116), (1864, 11180), (2080, 10019), (2236, 9320), (2330, 8944), (2795, 7456), (3029, 6880), (3440, 6058), (3728, 5590), (4472, 4660)]