20816328

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{487}}^1$

素因数の和:646

約数の個数: 64

約数和(自身を含む): 56568960

約数和(自身を除く): 35752632

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 104, 137, 156, 274, 312, 411, 487, 548, 822, 974, 1096, 1461, 1644, 1781, 1948, 2922, 3288, 3562, 3896, 5343, 5844, 6331, 7124, 10686, 11688, 12662, 14248, 18993, 21372, 25324, 37986, 42744, 50648, 66719, 75972, 133438, 151944, 200157, 266876, 400314, 533752, 800628, 867347, 1601256, 1734694, 2602041, 3469388, 5204082, 6938776, 10408164, 20816328]

約数ペア:

[(1, 20816328), (2, 10408164), (3, 6938776), (4, 5204082), (6, 3469388), (8, 2602041), (12, 1734694), (13, 1601256), (24, 867347), (26, 800628), (39, 533752), (52, 400314), (78, 266876), (104, 200157), (137, 151944), (156, 133438), (274, 75972), (312, 66719), (411, 50648), (487, 42744), (548, 37986), (822, 25324), (974, 21372), (1096, 18993), (1461, 14248), (1644, 12662), (1781, 11688), (1948, 10686), (2922, 7124), (3288, 6331), (3562, 5844), (3896, 5343)]