21334760

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13009}}^1$

素因数の和:13061

約数の個数: 32

約数和(自身を含む): 49177800

約数和(自身を除く): 27843040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13009, 26018, 52036, 65045, 104072, 130090, 260180, 520360, 533369, 1066738, 2133476, 2666845, 4266952, 5333690, 10667380, 21334760]

約数ペア:

[(1, 21334760), (2, 10667380), (4, 5333690), (5, 4266952), (8, 2666845), (10, 2133476), (20, 1066738), (40, 533369), (41, 520360), (82, 260180), (164, 130090), (205, 104072), (328, 65045), (410, 52036), (820, 26018), (1640, 13009)]