20020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1$

素因数の和:40

約数の個数: 48

約数和(自身を含む): 56448

約数和(自身を除く): 36428

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 91, 110, 130, 140, 143, 154, 182, 220, 260, 286, 308, 364, 385, 455, 572, 715, 770, 910, 1001, 1430, 1540, 1820, 2002, 2860, 4004, 5005, 10010, 20020]

約数ペア:

[(1, 20020), (2, 10010), (4, 5005), (5, 4004), (7, 2860), (10, 2002), (11, 1820), (13, 1540), (14, 1430), (20, 1001), (22, 910), (26, 770), (28, 715), (35, 572), (44, 455), (52, 385), (55, 364), (65, 308), (70, 286), (77, 260), (91, 220), (110, 182), (130, 154), (140, 143)]