21472520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13093}}^1$

素因数の和:13145

約数の個数: 32

約数和(自身を含む): 49495320

約数和(自身を除く): 28022800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13093, 26186, 52372, 65465, 104744, 130930, 261860, 523720, 536813, 1073626, 2147252, 2684065, 4294504, 5368130, 10736260, 21472520]

約数ペア:

[(1, 21472520), (2, 10736260), (4, 5368130), (5, 4294504), (8, 2684065), (10, 2147252), (20, 1073626), (40, 536813), (41, 523720), (82, 261860), (164, 130930), (205, 104744), (328, 65465), (410, 52372), (820, 26186), (1640, 13093)]