20807955

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{227}}^1$

素因数の和:345

約数の個数: 64

約数和(自身を含む): 42900480

約数和(自身を除く): 22092525

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 97, 105, 135, 189, 227, 291, 315, 485, 679, 681, 873, 945, 1135, 1455, 1589, 2037, 2043, 2619, 3395, 3405, 4365, 4767, 6111, 6129, 7945, 10185, 10215, 13095, 14301, 18333, 22019, 23835, 30555, 30645, 42903, 66057, 71505, 91665, 110095, 154133, 198171, 214515, 330285, 462399, 594513, 770665, 990855, 1387197, 2311995, 2972565, 4161591, 6935985, 20807955]

約数ペア:

[(1, 20807955), (3, 6935985), (5, 4161591), (7, 2972565), (9, 2311995), (15, 1387197), (21, 990855), (27, 770665), (35, 594513), (45, 462399), (63, 330285), (97, 214515), (105, 198171), (135, 154133), (189, 110095), (227, 91665), (291, 71505), (315, 66057), (485, 42903), (679, 30645), (681, 30555), (873, 23835), (945, 22019), (1135, 18333), (1455, 14301), (1589, 13095), (2037, 10215), (2043, 10185), (2619, 7945), (3395, 6129), (3405, 6111), (4365, 4767)]