20905716

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{7883}}^1$

素因数の和:7920

約数の個数: 48

約数和(自身を含む): 55629504

約数和(自身を除く): 34723788

約数列:

[1, 2, 3, 4, 6, 12, 13, 17, 26, 34, 39, 51, 52, 68, 78, 102, 156, 204, 221, 442, 663, 884, 1326, 2652, 7883, 15766, 23649, 31532, 47298, 94596, 102479, 134011, 204958, 268022, 307437, 402033, 409916, 536044, 614874, 804066, 1229748, 1608132, 1742143, 3484286, 5226429, 6968572, 10452858, 20905716]

約数ペア:

[(1, 20905716), (2, 10452858), (3, 6968572), (4, 5226429), (6, 3484286), (12, 1742143), (13, 1608132), (17, 1229748), (26, 804066), (34, 614874), (39, 536044), (51, 409916), (52, 402033), (68, 307437), (78, 268022), (102, 204958), (156, 134011), (204, 102479), (221, 94596), (442, 47298), (663, 31532), (884, 23649), (1326, 15766), (2652, 7883)]