7281820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{4001}}^1$

素因数の和:4030

約数の個数: 48

約数和(自身を含む): 18825408

約数和(自身を除く): 11543588

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 4001, 8002, 16004, 20005, 28007, 40010, 52013, 56014, 80020, 104026, 112028, 140035, 208052, 260065, 280070, 364091, 520130, 560140, 728182, 1040260, 1456364, 1820455, 3640910, 7281820]

約数ペア:

[(1, 7281820), (2, 3640910), (4, 1820455), (5, 1456364), (7, 1040260), (10, 728182), (13, 560140), (14, 520130), (20, 364091), (26, 280070), (28, 260065), (35, 208052), (52, 140035), (65, 112028), (70, 104026), (91, 80020), (130, 56014), (140, 52013), (182, 40010), (260, 28007), (364, 20005), (455, 16004), (910, 8002), (1820, 4001)]